This is likely via silent updates of Google’s Play Services.

Best way to have forgetful username.

Yes. And no. Develop capabilities to ensure you can defeat your enemy. Then scale down using game theory. It’s what has been done with nuclear warheads count.

Right now we can’t trust several players so yes, do arm. Also get into politics to prevent bad players (national or foreign) to take over the government.

You’re mostly right – those names sound like overkill. However do note I have been using Bitwarden’s Name Generator (random noun + number) and I’ve evolved the scheme a bit ( it is now always ‘user’ and I keep adding numbers until the generated username is available ).