Oh, I don't doubt that it was he posting on the official site. I believe it was an answer to an aikido question, and on that subject, he probably felt comfortable responding (and didn't the fans go ape**** over that. Probably embarrassed him to death, hence why he never returned). As for responding to anything else, not in a million years. Or, if one allows that anything is possible, I'll believe it when I see it.
Reality check time: I don't think that he gives a rat's ass about his film fans, and nothing we say or wish for, however ardently and faithfully, is going to change that. I must add, there are many words to describe Steven Seagal, but "dignified" isn't one of them.
Saying that, however, if he did condescend to mingle with us ground-grubbing mortals, that would be pretty damned cool (if he behaved himself, that is).
-TD, whose glass is half full (believe it or not!)