Subject: I'm even more confused by this.
Posted on: 2020-01-08 06:07:30 UTC
Your username can (and usually should) be a made-up nickname of your choosing. It's not personal information. Plus, you gave an e-mail address that I assume is not sensitive since you're concerned about privacy, so why not pick a username that matches it?
That said, no one else can use "Anonymous" as their name now, so I guess it does technically count as a unique identifier here. Doesn't help us to know what sorts of questions you've asked before, though.