Quoting myself:
I've had an ongoing debate with a hosting service over a fresh exit node being abused for network scans (ports 80 and 443) almost hourly for the last few days.
I had the former exit node unlocked an ran it in relay mode for a day. Today I switched back to exit mode, and a few hours after the exit flag was reassigned, I already received the next complaint about an outgoing network scan. The logs sent to me clearly confirm scans taking place, this is not about the hoster being obstinate.
Looks like I will have to shut down this particular exit for good if I cannot find a way to prevent it from being abused as network scan central. :-(
-Ralph