Users of Firefox now can enjoy an improved signal to noise ratio with this Greasemonkey script. It goes over the comments in the SL Blog, checks whether the poster is included in a ban list, and in that case hides their post. It might work with other WordPress sites, but I haven’t tested it. I might enhace the script some day. Hiding comments including certain words would be easy enough to do, and could be useful, given the amount of comments that sometimes get posted.
The ban list can be changed by editing the script, and currently only includes Lewis Nerd.
Greasemonkey is required to use the script.