He has asked his account to be deleted, after getting an official warning from Dilaton. His comments were singled out for rules violation--- namely being "off topic", and he received a lot of flak, including outright deletion of some comments.
(Not hiding, deletion, so that other mods can't restore the comment--- EDIT: turns out this was likely not the case, polarkernel says there were no deletions. EDIT2: Surprise! Despite Polarkernel's empty delete log, it actually was the case--- his comment " In Physics there are always doubts, ask better the conformist to stick to physics." was either edited down to an empty comment, which was then auto-erased so it wouldn't show up in the log, or else just outright deleted).
His response was to ask for his account to be deleted, which was immediately done, without discussion. I don't think this course of events is acceptable. The warnings that the discussion was "off topic" is a clear political censorship. Since I personally was under the impression that this politics is what this site was meant to avoid, this is somewhat heartbreaking, but not unexpected, given the events of some months ago.
The story here is essentially the same policy as anywhere, with different people on top. There's no "community moderation", there's moderation by arbitrary fiat, and official warnings, and official blocks. That's not what I signed up for. I have refrained from advertising the site further, and I think it's time to call the experiment a failure. You really can't trust anyone at all. I disagree with VK just as much. I would never censor him. I would have just moved his discussion to chat, if someone complained, and let it stay there indefinitely.