It may be useful for websites to make these logs public. The logs would show the exact time, the IP and the specific abuse.

In my experience, a lot of 'threat intelligence' data has a mysterious origin and is marginally useful. Yes, Tor exit nodes do bad things. Thank you, we sort of already knew that.

But I'm not sure that's really beneficial either. It would be interesting to observe trends (such as log4j) and we could see first hand how Tor exit nodes are used for abuse and maybe collect a large list of 'known bad' IPs.

Also, when we say an IP is bad (because it was observed doing a bad thing), how long do we keep it on the naughty list? 24 hours? More? Less? It may have been dynamically assigned and later some 'good' person will come along and want to use it to browse the web. If the IP is still on the bad list, that person will potentially be blocked by over zealous 'security professionals' who don't understand or don't care.

What other uses could be made of this type of log data?