The DNS entries for the EFnet and other mainline IRC servers previously affected appear to have timed-out/been removed from various ISP caching DNS resolvers I checked. I didn't check if all the routing blackholes have cleared up. User-based IRC servers should back to being pummled by Bot C&C requests as normal now. As I said, false positives suck. Unfortunately there isn't an anti-abuse system that never makes a mistake; unless you do nothing. I'm skeptical of people who claim they've never made a mistake.