I'd have wondered about it myself if I hadn't had prior evidence that Gwern wasn't a crazy person, so I'm not convinced that it's as obviously surface-innocuous as you feel it is. Perhaps I've been biased by hearing crazy-nerd stories (and actually going looking for them, 'cos I find them interesting). And I do think the PR disaster potential was something I would class as obvious, even if terrorist threats from web forum postings are statistically bogeyman stories.

I suspect we've reached the talking past each other stage.