[Nadya]

>It's way easier to write a script to generate thousands of variations on the same email address than to sign up for a thousand different accounts.

It's just as easy to write a script to use ephemeral hosts that you don't need to sign up for. Things like Mailinator.

All it does is irritate people like me who use +words as prefilters for email (and to see which companies are selling my email/user data).

[sodapopcan]

Fair enough! In my case it wasn't actually usernames, just entering an email address through a phone company for a free gift card from my old company so yeah, my point is moot.