wow. you can't even mentiion it. Why is "bitcointalk" + apostrophe S blacklisted!?
Maybe that one is a bit harsh nowadays.
I'll remove it. There used to be a spam/scam site with "bitcointalks" in the URL, but I think it's gone now.
AFAIK, it's impossible to bypass these special newbie wordfilters without mangling the URL in extreme ways. You might try encoding the URL in base64 (or whatever) to explain the filter that you're having trouble with.