You can block individual posters by adding them to your ignore list. Unfortunately it doesn't block it when someone quotes them and you will also see the titles of new threads they start but it's still pretty good for cutting down unwanted noise. I don't know if I've ever used it here but I used it extensively at SBR and found it very positive.
Beyond that, I don't know.
What's the problem? Had all the reno cool you can take?