is there a way to limit the registration per IP to avoid spam (manually registrations with fake emails)?
If a user has registered one account, he will not be able to register a second one with the same IP (optionally for X time)
Actually I don't see any antispam solution for node.js except yandex cleanweb which I saw somewhere.
On a side note, how are total users counted? Deleting users doesn't seem to lower the count just saying.