Having dealt with both Xestr and QS I can tell you 100% they are not the same person...
I'm pretty sure he was just trying to make a point. The difference is the post that was made by KoS, deleted and made again by his alt is they were the SAME EXACT post. This happened within minutes, I just happened to be browsing that thread at the right time.
Scams like this will easily be identified with the new forum, since it will record all edits and deletions for public use.