Some people are doing it and it is confusing
Scammers will like it because they keep the post count but can use a new identity. The only way to check is to see their old posts and try remembering who it was.
It's not that hard, look at an old post and see the name used when it is quoted. I do wish it would be easier, and that
people would give a heads up - it's confusing to see a name I've never heard with >2000 posts (creighto/Moonshadow, I'm looking at you).
I had a good reason to switch
and carried a nametag for a month.