Sigh, the joy of canned laughter. Actually when done right--which means
subtly--it can really add to the atmosphere of a programme; but when done wrongly it's just an in-your-face annoyance that actually sounds incongruous: why is the audience almost dying of laughter at a line that barely even qualifies as a pun? It's weird and embarrassing, and makes the programmes in question almost unwatchable.
I think the theory that TV directors think their audiences are imbeciles who need to be told in the most obvious terms possible when they need to laugh is probably correct. <_<
Still, at least it inspired some rather amusing reading material like the OP.