Depends if they're wittier/quicker-thinking than the comedians.
If they're drunk, they're just shit.
( Spider Fucking Riviera got stiches for a knife wound for the first time, Thu 11 Jun 2009, 0:44, archived)

they're always drunk and they're always shit,
heckling is only funny when it's unexpected and witty,
if you do it to everyone you're a cunt.
(PsychoChomp, Thu 11 Jun 2009, 0:45, archived)

Unless they're all dying on their arse.

( Spider Fucking Riviera got stiches for a knife wound for the first time, Thu 11 Jun 2009, 0:49, archived)