How do you prevent spam on your forum?
Provide or get advice on everything SEO, ask questions, gain confirmation or just become apart of a friendly, like minded community who love SEO and Online Marketing.
Same sort of thing happened to me. I'm gone for a month, and I come back all like: "Waaagh! That's a LOT of viagra!"Nope, but I did have a test forum once with 10k members and 300,000 spam posts.