A car driving around is a secret dead zone that punishes you for being nearby, even if you're not transgressing any social norms or traffic laws. Sitting on a park bench nearby? Hell, even being a passenger in a vehicle? That's the problem - he's being an indiscriminate vigilante.
That said, I totally agree with you on your main point. This is often a counter argument when people suggest that mobile devices should be disabled when the car is in motion (which isn't necessarily the same thing as jamming). Often, when I'm driving, my wife is looking up directions or letting a family member know that we're near.
As for the babysitter, deal with it. If you're not contactable for 90 minutes, you're not contactable for 90 minutes. This perma-connectivity is an entirely new phenomenon, and there's no absolute need for it. Essentially this argument is saying that the parent's inability to deal with lack of connectivity is a convenience which trumps the general theatre-going public's convenience of not having people talking on the phone, or who light up the people behind them because they're bored with the movie and are playing online.
Being uncontactable for a short period is not the horror that it's made out to be in these arguments. The good old argument that someone can't sit through a lecture without connectivity "in case Auntie Mabel dies", but of course it's just a cover for having phone access for other things. If one were to believe the excuses that get trotted out, you'd be forgiven for thinking that human mortality had skyrocketed since the public acceptance of mobile phones :)
On a different note, me and my friend and his wife went to see Roger Waters perform The Wall a couple years back. The tickets said "No photography", but the band was very careful to say "When you take photos, please make sure the flash on your cameras is off. There are effects during our production that camera flashes will disrupt." I'm paraphrasing, but they were projecting video on the bricks that were assembled onstage as part of the performance. Sure enough, not minutes into the first set, flash flash flash flash flash.
My friends were taking photos. I made sure not to look over at them.
It would seem letting people have a signal doesn't have to be a problem.
I think your definition of "disruption" may not be entirely reasonable. It's one thing if someone is sitting there having a chat during the movie, but if a person quietly getting up and excusing themselves (in response to an unheard vibration in their pocket) is unacceptable, then we're going have to ban anyone who sits down to a three-and-a-half-hour film with a Jumbo Big Gulp from the concession counter.
If a movie theatre did in fact install jammers each parent concerned about their kid (yea, it's probably not a true emergency, but subjective perception matters) or each doctor (I'm thinking more about delivering babies, which can mean being on call for weeks at a time, than an ER doctor) might choose to skip the movie. The end result is that that the theatre will likely take a hit on their profits. That's not a compelling reason to invest in installing a jammer.
The whole "we survived just fine without constant connectivity" argument is flawed. Yea, we did a lot of things without modern technology. We got along fine without movies, driving to the movies, mobile phones, the Internet, or arguing on the Internet about the need for mobile phone access during a movie.
Have another read of my comment, and you'll see in the middle of it that I'm saying that it's an argument of conveniences. It's convenient for a parent to have instant connectivity in case the babysitter calls, just as it's convenient for the audience to enjoy the movie they paid for without distractions. You say the theatre would take a financial hit for installing blocking devices, yet the more common trope is that the major annoyance in a theatre is people on phones - you could just as easily argue that they'd get a financial benefit from it. Doctors specifically on-call to deliver babies aren't much of a market segment to a movie theatre.
You clearly have no perspective.
I'd prefer my next trauma surgeon can relax and take in half a movie before he is called in on his pager to try and save my life, of which I have one that will be entirely in his hands. I don't give a fuck if you miss a couple of minutes of a movie that cost you $15 or even if it meant myself never being able to go into a movie theater again.
What's so wrong with having places that can only be attended by people who are fine with nobody will be able to reach them? Businesses don't have to serve everybody; in fact, selling exactly that escapism--that only people in certain classes and professions can afford the time to experience--is exactly the business model theatres. It is also the business model of cruise-lines and travel agencies.
If a trauma surgeon wants to see a movie, they can wait for it to come out on Netflix. Just so: if a trauma surgeon wants to go to the beach and sip mai-tais, they can find a public one within an hour's drive of the hospital.
(Note that this is all assuming that being on-call is a sensible thing to have in society. We really need to get ourselves enough employed doctors that we can guarantee we'll only need some of them at any given time, so the rest can actually stay home and sleep.)
Thing is, I just can't think of a single scenario where the rights of the many to enjoy uninterrupted entertainment in every theater outweigh the rights of everyone else to be in constant communication with whomever they chose to, for whatever reason they chose to. Regardless if they are a surgeon, parent, or just a loud douchebag in a movie theater.
So until these faraday cage theaters start popping up, if you want the movie theater without the rest of civilization, you'll just have to take a generator and projector to a National Park or start it yourself.
Seriously, get some perspective here.
As for perspective, you are right that life-and-death on-call people should be using pagers rather than phones, but you completely miss the point that you can get pagers that work on a higher frequency than the phone system. Your precious trauma surgeon can still have a pager that works in a theatre while disallowing phone use, since Faraday cages can be tuned to work on different frequencies. Pagers should be used because a pager service comes with a guaranteed SLA, and SMS services do not.
And frankly, I don't give a fuck about your ignorance, just don't use it to angrily insult me when I've done nothing to you.
That said, making calls to emergency services, if you have to run outside to make that call, you've lost 30 seconds or a couple minutes. And you can't follow their directions in aiding the person because you're outside, and the victim(s) are inside. That's assuming it's not an attacker who would prevent you from leaving in the first place.
Is this really such a pandemic in the US these days?
[1] http://www.usatoday.com/story/news/nation/2012/12/05/woman-k...
[2] http://chartsbin.com/view/32k -- I'm assuming this is accurate