How to prevent spam links to be posted?

[hymoo]

Hi, one of my forums get abused by a lot of competitors. Basically they posted spam links to new threads and they just keep coming back with new IDs. Maybe they hire paid posters to do this. I want to know if there's any plugin or something that can prevent some specific links to be posted? For example, I want when someone makes a new thread/new reply with link to "xxxxxx.com", the post won't be visible to users (or even deleted automatically). Please tell me how to do that?

[James Birkett]

Create a usergroup and set it to have to approve every post, that way you'll approve every post they make. Then set a promotion up after say 5 posts to "Registered Users" from which they can post normally.

[kevcj]

There is a modification here on vb.org that prevents users from being able to post links until they get something like 15 post. Just go do a few searches, you should be able to find it.

[Swampfox]

make their domain a dirty word :D