Suggestions to stop Spammers?

[Speedy059]

I need 1-3 best ways to stop spammers as the current Email Registration and Recaptcha isn't stopping them. We are having to ban 2-5 users each day on a SMALL forum. I'm not sure if there are addons/plugins to help tighten security. If anyone has experience, please suggest anything to me. I appreciate any suggestions as I'm not sure how to tackle this!

Thanks!

[James Birkett]

This (https://vborg.vbsupport.ru/showthread.php?t=184757).
I also recommend looking at this (http://www.vbulletin.com/forum/showthread.php?t=275800). It says 3.7 but basically works for every version.

[Itchy Nips]

i have this mod installed and it works great
https://vborg.vbsupport.ru/showthread.php?t=176481