I'm no fan of long copyrights, etc., but in this case to me it's a clear cut case.
When you're stealing assets and adding your own tracking code, you're transforming the work, which is a definite no-no for copyright and trademark law. Not to mention that by intercepting traffic which was meant for a competitor you're literally interfering with their business and risk fraud charges.
If you go and pick the lock of a random house in your city and get caught by the police, I very much doubt that the defence "I was just doing it to see if I could" is going to help you.
If you only get caught after leaving the premises it is trespassing, since it's apparent you didn't steal. Picking a lock in order to trespass might make the sentence a bit harsher than normal.
Not only that, they can move in!
Here in Belgium a young couple left the country to do volunteering work only to hear from friends back home that gypsies had squatted their house. Official reaction of the mayor of Ghent was "I can't do anything about it ... it's complicated"
Obviously breaking & entering is a crime but if you're "living" there, only the courts can kick you out after following all the necessary legal steps.
UK has (had) similar squatting laws but afaik those were mainly (ab)used in the 90s to throw parties in abandoned warehouses.
The antidote is desirable for a community. If you don't want squatters in a building you never live in, let somebody else live there instead. Now if it comes to it (which it probably won't) any squatters will lose. Lots of places that somebody owns and might otherwise stay empty have people living in them for very little rent for this reason. If you've got a good reputation don't care where you live and don't mind potentially having to leave on very short notice when the real owner wants it back, you can get very, very cheap rent in crazy buildings because of this. People live in unused lighthouses, buildings that used to be part of defence systems, big factories, all sorts of stuff.
Maybe I don't have the money to provide safe electrical / water / heating / fire safety systems. But I also don't want a tribe of homeless people in there.
I also know someone who's kept a property empty for 10 years. He lived there together with his wife, she passed away, he moved out and never had the courage to move out all her stuff.
Also, who doesn't find it cool? You don't seem to be saying that what is described in the article isn't cool, you seem to be making a broader claim that copyright violation and fraud aren't cool.
Lets assume you find what is described in this article copyright violation and fraud, because after all, you said it is. Apparently some people on HN find what the author has done cool, judging by the comments. Ergo, some things that you, specifically, consider 'copyright violation and fraud' are in fact cool.
It's still an interesting hack, so good to see it being talked about. But it is not ethical and definitely illegal in almost any jurisdiction.
The USA is a notable exception, perhaps due to the vested interests with deep pockets.
I was merely reacting to broad nature of the claims in parent comment. There is a world beyond the US and Europe, laws are not universal truths, they are a representation of what we have come to agree upon as rules to play by. In copyright law specifically though there is often a chasm between what the people find good rules and what companies find good rules. But that is a different discussion.