tech_diver
Contributor
There are lots of public lists of known VPN ip's. Some people try to charge for the lists but you can find them for free as well. Grab some of the VPN IP lists and mas-ban the ip's. Or just setup a batch file to route them to 127.0.0.1 if xenforo doesn't have a mass ban feature.
example: List of anonymizing VPN services IP address :: udger.com
I've been thinking of subscribing to a VPN just for online security. Would this strategy ban anyone who logs on through these VPNs?