Swearing never tends to bother me much, so I don't get really get offended. However, I was surprised when the phrase "pissed off" was broadcast in a Simpsons episode (just after 1800 too) because i'm sure its the only time I've ever heard a swear word in its whole run.
Can only assume its because the word is less rude in the States or that it is broadcast at a later time there? Or is the word a pre-watershed one in the UK now?
Like I say, I'm not bothered by it, but surprised it got through.