I agree that it would be nice to have some guidance on how to decide what to vote up or down (or if to vote at all).
Oh noes! That would be so very bad. It makes me think with horror of the "voting suggestions" handed down by priests in their sermons to their flock. A worse situation can hardly be imagined.
Voting only works if it is free of all influence, only between you and your conscience. Of course you then get the government, web-site, community, ... you deserve, but that it still infinitely better that getting the government, web-site or community someone else thinks you deserve.
A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James