I don't know, that one doesn't seem as benign as your making it out to be. I would say if you're having your parents subsidize your phone bill you're still not technically living on your own.

Cell phone companies incentivize this, though. It's a better deal for both the parents and children (often 50%) with no difference in service

theres plenty of people making 6 figures at 25 that still have their parents pay their phone bill because they get a family discount. i dont get your point