lol we had a food fight in our school backyard...people bought fish fresh from the market and threw them/ slapped people with them XD
not if you keep throwing it at the people staring at you. They're bound to get annoyed at some point in time and retaliate by throwing something back. Then you duck and it hits the person behind you, then they throw something and so on and so forth.
Once my table got hit with corn. No food fights started, we were just pissed.
only if you suck at starting them.
if you were any good you wouldn't let any see you start it ;)
i ALMOST considered doing that in elementary, but decided not to.