Well, but the point here is not to point and laugh saying offending stuff to eachothers. if I posted a picture of me pukin all over the WC while beeing drunk like a stone I would just laugh my ass off of a comment like that, but again it was not a picture like that.
You need to find a comment that suits the "theme" of the picture if you understand what I mean, and even if you are allowed to write almost whatever you want, it could be nice if someone showed normal curtisy