I've been taking a look at some of the IPs responsible for spam directory submissions, and where they come from. There's a tool here if you want to do the same (but it only allows you to do about 20 lookups before complaining about over-use): http://www.geobytes.com/IpLocator.htm What I found was interesting. By far the largest amount of spam comes from India, with just a small proportion of spam submissions coming from other countries. I would have thought it would be more evenly spread.