I get a lot of these on a forum which I administer - people register and make one post full of links. What they don't seem to realise is that we have an approvals plug-in, by which posts or users have to be approved before their posts become visible to non-admins. All this stuff therefore gets deleted, the offending users deleted and their IP address barred. As batsgirl noted above, Real People (TM) are now employed to post this sort of cr@p, now that the spam-bots have been countered with visual confirmation widgets and the like.