I would be very surprised if it turned out ialdabaoth was falsely accusing Eugine simply to cause him trouble.

I don't doubt he has some evidence for Eugine being the culprit. That doesn't mean he didn't name him to cause him trouble, in fact it's probably why he did so. I suppose Sense 1 and 2 don't cover all the possibilities then.

Introducing a norm of naming names is a mechanism for changing the system.

Would you call street justice a system? Do you think the press should publish the names of all people accused of a crime? Do you like the idea of being wrongly named? This is not well poisoning, but trying to establish whether it works anywhere else. You're expecting quite a lot from lesswrongians here.

Eugine's karma ratio for the past month has dropped from 75 % to 52 % after he was named. What do you think of that?