[magnets]

Here's another idea.

I'm not sure if VB supports this, but another forum I used to visit had an option to flag as spam. Then, if ten users with more than 100 posts had marked a post as spam, it would disappear, and a moderator could either delete it if it was spam, or keep it if it was a real post

With this solution, the spam would show up, but it would disappear as soon as ten users marked it as spam.