I wrote a reddit post on this http://reddit.com/info/gg2w/comments http://reddit.com/info/gg2w/comments ... although most other commenters didn't agree. Summa

I wrote a reddit post on this http://reddit.com/info/gg2w/comments http://reddit.com/info/gg2w/comments ... although most other commenters didn't agree. Summary: up only voting measures personal interest. It tends to promote anything that has a constituency. Up and down voting measures community approval. It tends to promote group-think.