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.
Shameful. One thing that might work for the fediverse is federal institutions running their own Mastadon instances on .gov to move away from announcements on Twitter. You can’t fake .gov domains.