This may have changed somewhat since I'm not in a position which requires me to do this anymore but this was the standard for years.
Which is why I always _highly_ recommend Californian's to get a private mail box or post office box and use that as your mailing address. Then your residence information is private and only law enforcement can see it.
Bouncers can use any excuse to decide to let you in or not so I guess they can just say no, show me your ID/driver's license and you are fucked if you don't have one. They can even decide unilaterally to not look at your smartphone screen if you have it in google wallet, you have little recourse. What will you do, sue them because they let your friends in but you stayed outside?
https://en.wikipedia.org/wiki/Driver%27s_Privacy_Protection_...
So, split that mailing address off, if you can.
If Hilton/marriott/IHG/choice/wyndham were not almost all franchised, then I bet they would institute global bans.
I can’t imagine bars are any different.
Besides, like you say, banning people. But that's legitimate.
And in terms of aggregating information, the credit card companies know who uses their cards there. ID's aren't adding anything useful.
AFAIK scanning ID's really is entirely about catching fakes and banning people who have misbehaved.
My simple rule is that a system should be categorized for what it does most of the time. I bet that person working the front door has scanned thousands of IDs, and probably only found a handful of fakes, if any.
So AFAIK, they are scanning IDs and collecting data, and every blue moon, a fake is found and it is then the entire system has found it's true purpose?
So yes, even if there's a fake only once every two weeks, or whatever you consider to be once in a "blue moon" -- that is the purpose of the system.
Believe me, bars don't check ID's because they want to. They do it because the legal consequences are extremely serious otherwise, and "but the ID looked real to our bouncer" isn't a defense, hence the scanning.
There's nothing naive. I think you just aren't familiar with the laws around this.