James, good point. In fact, the MT throttling mechanism hasn't been particularly effective for me. The other night I got about 40 comments from a robot that used different IPs that posted at random intervals of 5-15 minutes. Pretty nifty. The most effective anti-spam tool I've seen is MT-Blacklist (
http://www.jayallen.org/projects/mt-blacklist/) which lets you block content that matches specific strings or regular expressions, particularly hrefs, a spammer's weak point. If/when this becomes an issue, one could either turn off anonymous postings or copy all of the good ideas in MT-Blacklist.
