Every day I have to delete about 20 spam "guest" posts. This is a new problem and started a couple of months ago. Apparently there is a new vulnerability in the system that makes it easy to automate spam guest posts on Invision forums.
These spam post only serve to irritate board administrators, because these guest posts are deleted and never see the light of day. So the motivation for spammer to do this is not clear to me...
Black listing IP address have no impact, as the IP addresses used changes daily.
Has anyone else seen this problem? What have you done to stop it? Block the IP address of the entire russian federation would help, but that is a brute force solution and would not completely eliminate the problem.
I've even see these types of posts on Invision's own community forums
Spam account registration currently outnumber normal registrations.