It's sorta like a website I went to when I was 8 or 9. (Can't remember.) I wanted to use the username "boobooonmyleg", (I had a scab on my leg at that time, and I couldn't think of a username I could remember and wasn't being used.) which wouldn't go through because "Your username cannot contain the word "boob"."
Yeah, that's kind of a problem. I think we should be able to evade the filter for using words like wristwatch. (That wasn't a cuss word, just so you know.)
For example, if at was a cuss word, we should be able to use "that".