I've no problem with hecklers, I was one myself once, in a supportive sort of way, of course.
I also have a small collection of retorts that represent a generation of years in folk-clubs, they are not all original with me, some are, and they are mostly funny enough to shut hecklers up without them waiting for me outside.

I haven't looked, has there been a thread specifically on retorts to hecklers and chatterers?