He's been so obsessively assmad about it that he inflicted "X" on one of his offspring as their legal moniker, thereby pretty much guaranteeing future estrangement issues when the kid becomes old enough to realize that daddy is a nerdy weirdo.
Most famously, as soon as he bought Twitter, he renamed it "X", which was the corporate equivalent of drunk-dialing the person who dumped you back in 2001 just to go "NEENER NEENER! I don't miss you at all!"
If you want an example of how petty and obsessive he is about this issue, check this shit out:
If a user typed in "Twitter.com," they would see "Twitter.com" as they typed it before hitting "Post." But, after submitting, the platform would show "X.com" in its place on the X for iOS app, without the user's permission, for everyone viewing the post.
They can't do anything about the hordes of ░P░ U░S░S░ Y░I░ N░B░I░O ░ spambots, but they had coders diligently working to make sure you didn't hurt Elon's fee-fees by deadnaming his company.
