...Are you entirely serious?
Channel 4 air it at 6 in the evening. Prime time, which, as much as I am an advocate of frees peech, wouldn't want my kids to pick up bad vocal habits from a TV show
Yes, it's good to know that they won't hear the word "bloody" from a TV show at 6pm because it's far stronger than anything they'll hear in the school playground isn't it(?)
If you'd bothered to research it a little, you'd know that channel 4 also air the simpsons late night.
Purely as filler, not because of controversial episodes.