Holy crap, a comment blocker! That's what I'm missing in my life! Now if only I could find something like that for Safari... (Chrome has ceased to work on this computer recently.)
I recently registered an account at an otherwise thoughtful and insightful videogame blog, because it gave me the option of blocking comments from individual users. After I set up the account, I went and calibrated the blocker on a "Women in Games" post. My reading experience has improved many times over since then! And it's always funny when I see that an *entire thread* has been blocked.