that sort of limitation scheme would be a huge detriment to the program. when on trips I sometimes need more than 30 minutes of charging to reach my next stop. you are correct that this would annoy many if not most owners.
I'm not the one proposing the 30 minute charging rule - Tesla has apparently already done that for this location due to overcrowding. I'm just proposing ways that limit could be made to work, rather than being words that only the folks who weren't problems in the first place obey. Your annoyance is misdirected.