that won't work...they go after common off-topic forum names.

general chat, misc, etc, non-(anything it seems)...all are targets.

how many legit new members are signing up a day? you may be better off having to validate new members before they can post, or finding an anti-spam/verification hack for the board software. i've even seen boards that won't accept registrations from people using free email accounts, cuts down on the spam and BS.