After years of using Vbulletin, I never noticed tags until about six months ago and until reading this topic had no idea they could be a problem. Now I have to go back to another site and see if there's a problem there. We got the blog module at that other site and it was barely used until the spammers spotted it and started filling it up with spam and blogs with spam imbedded. I ended up turning off the blog module a few weeks ago because it was such a pain to delete/edit and no one seems to have noticed that it is gone.