I've done a bit of bullpen razzing in my day, but was never afraid of a chair coming my way....
3 years ago in Fenway a few of us were talking some trash to Ricky Bones of the Marlins. He was having a good time with it and finally when somebody yelled "Hey Bones, you haven't even pitched in a week, why do you even play baseball" he looked back with a smile and put up two fingers, then a fist, then one finger then scratched his fingers together (universal sign for money) and then pointed at himself...as in "I make $2.1 million..."
it was actually pretty funny.
Some of my friends were at Wrigley a few years back razzing griffey in the outfield. By the 6th inning or so he'd had enough and turned around between plays and yelled "I f*cked your wife" to one of my friends (who is pretty sure he didn't in fact f his wife....)