While I agree (ish) that most hotels should have destination chargers, it's a bit of magical thinking to think that would solve the problem. If they have 2 destination chargers and 4 people with Teslas are staying the night then someone will make a "rule" that you should supercharge to 90% then use the Level 2, then disconnect and move so someone else can use it...or some such thing.
The thing is that common courtesy and common sense should prevail. If you plug in at 5pm for the night, you probably should move even at a low volume location. If you get there at 1am and are leaving at 6am, it's probably ok to stay plugged in (or at least I believe so). If it's a high volume place, then you maybe should wait to plug in until the volumes decrease if you're not going anywhere anyway, then unplug and move immediately when you have adequate charge.
There is no one 'right' way here and those who are so pedantic to suggest that there is are not really considering all circumstances, such as the one I gave earlier in my example. Had I thought there was any chance my staying plugged in would inconvenience anyone, I would have moved it. I do try to leave my number on the car so someone could call me if absolutely necessary...I didn't see anyone else suggest that. And there's the implied risk of the fine if more than 50% occupied, so that should be incentive for most people to not take the risk if they think there's any chance that could happen. Under the same circumstances, I'll stay plugged in overnight in the future...not because I don't care or am narcissistic, but because it's logical, reasonable and doesn't risk inconveniencing anyone else.