I too use Zone Defense, and believe it or not intrusions have been attempted by the IP address attached to Mudcat's domain.I've logged them and traced them back to their source and I shit you not.
Coincidence? I think not. Big Brother is watching, and make no mistake, all IP addresses of all Mudcatters are being tracked by the powers that be here.
All the more reason to use a program like Zone Defense.
Now watch. This entire thread will probably be magically deleted.