Re:Why I can not upvote a story? I am a new user.
by jebblue on Sunday June 03, 2012 @02:35PM
(#4061454)
It looks like on this site, anyone can express an opinion of agreement with an up vote but only some who have earned it are allowed to express they disagree by using a down vote. Anyone can comment though.
I think you can probably see that this is a guard against "sock puppets" being used to promote spam posts.