Pruned threads still gives 200, how do you set it as 404?

[deLisle]

Hi.

I've had a huge spam issue with my vbulletin forum and i've done a huge cleanup by pruning threads etc.

However, these spam threads are still accessable since the spam robots are linking to them.

They pages just say "There are no threads on this page..." but this is not good for SEO.

Is there any way to make the pruned threads give 404 response or something like that?