That is correct. People tend to adapt behaviour from their surroundings, they are very social creatures after all. But those who do, have to have some predisposition to the said behaviour, it is almost like they seek the validation to just let go... For example, you can take a look at a drug addicts. When someone observe, that this behaviour is acceptable, he/she just "go with a flow". It is a sign of a weak mind, a conformist.