How can I prevent "spam" user registrations? We recently launched our first site with front end user registration and we are getting a lot (not a ton, like 5 a day) spam registrations. See here:



Im trying to find a way to cut down on these without doing something like a captcha but maybe thats my only option?
Plugins:


Snaptcha (private beta)
Works with the User Registration Form, Contact Form Plugin and Sprout Forms Plugin
Invisible Captcha (private beta)  


.

Config:

If you don't mind having a few spam-users in your list. Just add purgePendingUsersDuration to your config.

This will purge all users which haven't been activated for x time.