True, but googling soufron brings up a popular lawyer with that last name, whose social media and website use the same handle, and even has a wikipedia page. So I'm assuming he knows he's easy to find.
Unlike linking to Nicholson's socials from your HN account, which would totally count as proof...
We simply aren't discussing how to prove his identity, just how to contact him (or whoever he could be impersonating) when he didn't provide contact info.