This might get us an "IT'S NOT SERIOUS ENOUGH" email, but the dialog currently looks junky with no buttons and implementing this button amused me greatly.

This is PhabricatorUserEditor, but it predates ApplicationTransactions so it's kind of funky and has a lot of code duplication compared to ApplicationTransactions (no shared code for database transaction management, e.g). We'll probably switch it over eventually, but I think it's lowish priority since it doesn't cause any concrete problems or really block anything (e.g., we don't need to publish any of this to news feed).

Well, maybe it would be nice to publish a "user signed up" story.

And maybe it would be nice to get a Herald email on a new user signup.

So maybe this does block stuff.

But no one has asked for these things, at least.