Might be hacked accounts. The same happens on facebook. Some friend had their account stolen, and could not get it back. Half a year later the name and profile picture changes to “Elon Musk”. Reported it to facebook for Scam and “Impersonating public figure”. They have a report category for this exact case, so surely they know that this is a problem and they will take care of it, right? Nope, according to Facebook everything is A-Ok with the account, and no action is taken.