You should probably remove Scott, if I am correct in thinking that it's actually a combination of Adams, Aaronson and Bakker (and there might well be everything from Bon Scott to Sir Walter Scott in there).
You are right. I removed Scott. I checked the list again, and spotted and removed Winston. Now it seems legit, except for the hard-to-correct discrepancy between mention and author. (Marx and Hitler are mostly mentions.)
I created a 2011 update to last year's Best of Rationality Quotes collection. (Here is the original.)
Best of Rationality Quotes 2011 (360kB page, 352 quotes)
The page was built by a short script (source code here) from all the LW Rationality Quotes threads so far. (We had such a thread each month since April 2009.) The script collects all comments with karma score 10 or more, and sorts them by score. Replies are not collected, only top-level comments.
A year ago commenters asked for various statistics and top-lists based on the data. This year I re-ran the scripts I wrote to answer those requests. (Source code for these is also at the above link, see the README.) I added the results as comments to this post: