To me, nubbins did an actual PSA, converting his free time to a public warning. Nubbins did the right thing. I think we need more people like him in this community. We all have some special knowledge on different topics. Sharing it will help the community in its entirety.
Now on this specific case, I think the evidence presented was quite convincing. You can't really say that it was a baseless accusation. Bitcointalk seems to have pretty decent understanding of who is a bad guy and who is not. This community usually comes to the right conclusion when appropriate evidence is presented.