Mikie Mahtook was a lot of fun at the Knights/Bulls game I went to last month. He took plenty of horsefeathers from the crowd, and he gave plenty back with a smile. It helped his case that he was getting all sorts of balls thrown out to him by coaches and whatnot so he could give them to kids in the stands.
It wasn't much of a "heckle", but my then 8 year old daughter yelled at Bill Hall at a AAA game. "Hey, do you know your name is half Ls?". He noticed and struck out, and laughed and waved on his way back to the dugout.