on the vgc forums we have a nice and simple way of doing this: IP bans.
edit: also i still think these are bots, and they're just hacking around registration by exploiting some back door. the only reason i say this is that cheap labor would not be assigned to a relatively small forum like this; cheap labor would go straight to the largest forums on the web. the only time small sites get spammed is by plug-and-runners, which these are not, and bots.
editedit: have you dl'ed the latest security update from PunBB? it's from around May or so...
edit: also i still think these are bots, and they're just hacking around registration by exploiting some back door. the only reason i say this is that cheap labor would not be assigned to a relatively small forum like this; cheap labor would go straight to the largest forums on the web. the only time small sites get spammed is by plug-and-runners, which these are not, and bots.
editedit: have you dl'ed the latest security update from PunBB? it's from around May or so...