What's with the automatic censorship?

Is this new? Or have I just not seen it before? It's pretty annoying as if you write the words Arsenal then it censors it, even though it is a football club, or a word that means a collection of weapons. Can someone fix this?
 
Guess I never used a word that needed censorship, I guess. Mind you, it doesn't censor all words, shite isn't censored. Although, some races can only be described using that word. I'm still confused as to why Ar.senal is censored. Because just conataining a vulgar word doesn't necessarily merit censorship, as proved above. Is there just someone among the IT staff who really hates the gunners?