Fair point, that would certainly change my assessment of the guy and the warranted mod action, albeit not of the public aspect of this. As Jiro mentioned up the comment chain, it certainly is a trade-off. Maybe noone would have put the clues together otherwise (or see their suspicions mirrored by others), and yours is important indeed.

I guess the whole "single someone out publicly in a negative way" is my personal ugh-field (who woulda thunk, right?), which may be why I seem to fall on the other side of the trade-off than apparently most other LW'ers.