@goodbot was doing that for a while. Not sure why they stopped other than the fact it didn't really discourage users much. I'm not a fan of using bots for automated flagging. My thoughts were along the lines of pulling the data on those that abuse it the most and working top down. If users don't stop I will add them to @cheetah from spamming tags. Especially when accounts are automatically up-voting those tags.

Just my thoughts on it. :)