Disprove that pink elephants exist vs prove that gray ones do.
Which one is the easier challenge ?
Yes, and still people seem take the denials of the other users at face value.
I think that we're all treating this as a game, under the assumption that if we figure out who onetimetoken is he'll tell us, as it supports his point that privacy is dead. Also, it wouldn't be fun if we assumed that he will deny it if identified. Never underestimate the importance of having fun.