I don't find it offensive because it is the real world. True there are people here who are younger but can't protect kids forever ya know? We could have the kinds of people on here who shouldn't be. So, I think he should be able to express himself.
I mean what are we soppoused to do censor everything we say and do on like every forum. The forum I used to be on had minors that were viewing pornographic photos/videos because they lied about their age when registering.
So, I do not find it wrong at all even if I am 18.