If you tell people they can't skip in a certain lane on the sidewalk they will skip in that certain lane. There will always be people who just want to cross the line because the lines existence makes them curious or "rebellious". It's like a psychological balance for some people. Being told "no" really makes some people want something.

The counter of this is why underage drinking is higher in the US than elsewhere. Society made it a taboo and that attracts people. In countries with lower age limits there's less underage drinking. The culture itself doesn't see it as such a big deal and there's no pent up against.