Blacklisting a coma as a single post

Will Nightbot timeout if a username has bad words…and can you blacklist a single coma and/or a period?

I have a super troll that is spamming chat with multi-posts in a row like lightning…and is putting the foul comment in the username…then only uses a coma or a period for the actual comment.

This troll is shutting down chats with impunity. I need help please.

It would be way more efficient just to ban the user. If he keeps creating new accounts, enable follower only mode.