What about the use of a laugh track as a joke itself?
I know futurama has done something like that from time to time, perhaps even the simpsons.
Family Guy has done that with the studio audience, too.
Yeah i remember those, bug again i can't remember if it was specifically that, the simpsons or futurama. I'm sure they've all done it at one point.
Two of my favorite examples are in Futurama, when they had Bender make a ton of one liners off camera for a lot of the episode (Human Horn episode, ie Lurr gives a speach about treating animals, big or small, with care and bender shouts "IN THIS CASE SMALL" lol).
The other one is the episode where Leela thinks she's found another long lost cyclops and they bicker like Al & Peggy while their neighbors watched on the couch while laughing/whistling like the Married... With Children audience used to haha.
God every time i think of that episode, i wish they had Ed O'neil to play Alquezar.. how EPIC would that have been!?