There is an argument to be had that using offensive words and slang, regardless of context, is promoting its negative usage. That is to say, with your signature as an example, using rape as a joke even when you or the creator don't approve means it still invokes the horrific context in which it spawns from. It is a cop-out similar in nature to say, "Not to be offensive, but [offensive commentary]", "Look I'm just saying, [rhetoric about sensitive topic said offensively]".
I am of the mind it's generally sound to disapprove of such jokes and usage of negative words that demeans their severity. However, I've not convinced the administration of this position so I refrain from enforcing such a view.