Litigation because of freaking out.. but I just have the image of the Simpsons in my mind 'who will think of the children'. The U.S., love 'em, admits violence but is prudish. Always found it a strange thing but hey, it's cultural so we'll accept their quirks. The internet is mature enough to handle not forcing cultural change.
No, wyclif is right. The people who "freak out" over this kind of thing at work are really just looking for a payday. Anyone can be easily offended if money is involved.
Hm, I'm not so sure. Some of us come from cultures where reason and responsibility are widely-held ideals, and come before making a quick buck on the expense of others.
It's more a question of the legal environment than culture. No matter what the culture says there will always be people ready to exploit these kinds of situations.