Off the top of my head, SpongeBob SquarePants, Danny Phantom, Fairly Oddparents, The Big Bang Theory and It's Always Sunny in Philadelphia all have jokes, if not the main plot point of the episode, that are just mocking the existence of LGBTQ people.
The 2006 future documentary "Idiocracy" is a great time capsule for how common and acceptable "f****t" was not too long ago.
deleted by creator
That was definitely the intent -- "this is what the lowest form of humor looks like." In the mid-00s, though, that lowest form of humor was dudes calling each other slurs like that.
Idiocracy is a shit eugenicist movie.