If you just want to not see the scores, but still see the author names, then Marcello's script isn't appropriate, because I think that hides the author as well.

I just added a LessWrong Comment Score Tweaks script that can be used to hide/display scores or toggle between visible and hidden.

After you install greasemonkey and that script, the "user script commands" menu of greasemonkey on lesswrong pages will contain:

• Toggle Comment Scores
• Hide Comment Scores
• Show Comment Scores

There are also some key bindings defined for these. They don't work for me, but they might work for others.