An extranordinary claim needs a bit more evidence than one datapoint where in his defense maybe he is scared of anyone he doesn't know trying to talk on the street.
Agreed, his two posts read really weirdly. He made a deliberately vague(?) initial post to get a response and I'm not sure how I feel about his story as you've said, if I was Sam Altman I'd be wary of anyone coming up to me too.
Also mentioned was that more evidence is not hard to find