seoholic - 1:21 am on Sep 26, 2010 (gmt 0)
True 404, correct.
I get newer spamlinks directly to my homepage and not to my forum. So the spammers behaviour evolved. This includes using blogs/subdomains... instead of or additional to forumposts (it's hard to analyse this garbage).
I'm not sure why this happens, most of the other sites, although they deleted the forumposts, still get links to their (404) forums.
I suppose that there always will be a new link directly pointing to my homepage replacing the old 404 links to my forum.
So far my site hasn't suffered, but it's interesting to watch, because it's an obvious error and Google doesn't fix it.