Kyrne It seems to work so far just fine. Maybe in the future the regex support could be added. I really like the idea of this extension and I think it would be worth it to revive it. Automatically flagging potentially bad posts is very cool.
The only issue is, trying to filter for something like profanity is difficult. Someone could just spell the word differently or add spaces, or something to get around the filter. I don't know how Snipe did it and I don't even know how well her profanity filter works, but I'm going to guess that her profanity filter is coded in such a way that it catches some of the attempts someone might make to get around the filter.
Anyway, again, this extension will work for now. Great extension for your first one!