Because let’s say you’re Tom Hanks. And you get TomHanks@Lemmy.World
Well, what’s stopping someone else from adopting TomHanks@Lemm.ee?
And some platforms minimize the text size of platform, or hide it entirely. So you just might see TomHanks, and think it’s him. But it’s actually a 7 year old Chinese boy with a broken leg in Arizona.
Because anyone can grab the same name, on a different platform.
There’s over 1400 people solely in the US named Tom Hanks. Tom Hanks The Celebrity does not get patent rights or trademarks or copyrights on the name.
Wanna know which is the Tom Hanks The Celebrity? Check if their profile is authenticated against their personal website, à-la-Mastodon.