Why, after learned article rating it is impossible for her to vote?

it is not called "learned" a "abstained from voting"

Avoid the bandwagon effect in the absence of their own opinions :-) Sometimes even read an article, liked it, read the critical comments and changed my mind, so that the comments also had to hide before the vote, but the concealment of the rating is low, what can be done.

Because then you can do "all" and not how he appreciated the article.