Re: @RyokuMas - "Good men"...
El Reg do provide a block user facility. By every username on the forums is a stripy sad face. It's between their name, and their badge (if they have one). You simply click on that, and their posts disappear.
Of course the problem is that you can't block anon posters. Otherwise you could block a particular post and then work out which other posts that user has made - and de-anonymise them (at least a bit).
Then again, I don't see the point. If I saw the name Eadon, then I could simply ignore the post - i.e. let my brain filter what I read in the same way I do everywhere else. Which is why I notice so few online adverts.
It also helps that many of the more annoying posters give clues in their first paragraph. So if I see: LIBLABCON, ConDem, FRACTIONAL RESERVE BANKING, HARP, sheeple - lots of capitalisation in general - then I know that I can safely skip the rest of that post.