Our new Buddypress site is being completely taken over by spam.

We have 518 new users and my guess it the majority is spam, but I can't figure out how to tell. We added a google CAPTCHA to the Buddypress registration but it doesn't seem to be working. Once they have created accounts they are creating TONS of spam groups. The way our community is setup we need to always users to create their own groups, but having that on is a mess. Any suggestions?