I think for one thing you are generalizing college kids as one group. I feel that often a lot of students come to college with that very intention. Whereas often the people who are the real role models making a difference may not being in that category. Of course I realize that Im stereotyping and there all the shades of gray in between, but i think its a more accurate model. Feel free to correct me.
I think that often they say that to protect kids from those things because they feel an obligation to do so. Not doing so would be looked down upon publicly. However I also have to pull the card that by doing so we inadvertantly maybe harming them by putting up a barrier. They say that rules are meant to be broken and people end up doing it violently to top one another.