Verification will very quickly become an issue on Fedi, I believe.
Even now, we have multiple "Linus Torvalds" accounts.
Some have thousands of followers and a few posts, but do we know if any of them are actually him? Including the newest one on .social...?
Obviously Linus should know how to paste a link into a website he owns for verification.
However, if normal users can't do it, it's not good enough. What happens when/if celebrities start signing up? They're not gonna be linking to a website they own for verification.