BuddyPress.org

Hi,

don’t try to prevent spammers. They already know how WP is working. 😀

So you have many unconfirmed subscriber anyway. In such case, you could resend the activation email or delete the unconfirmed account. A small plugin do this very easely:

https://wordpress.org/extend/plugins/unconfirmed/

I use it regularly on my 1.6.2 network without problems. 😉