I have been reporting them. I hope they find a common formula or something that gives away the posts.
He suggested I just report them to the local Mod for passing on - so I don't think they've actually got a system in place yet.
It is starting to be needed, but my real fear is that as the tech gets better it will be hellish - but they will have already let the bots in. At the moment it's a post every couple of pages, soon every few posts... Eventually you will strain your eyes wondering which post (if any) is written by a carbon-based life-form!