Well as long as voting is an inherent part of earning SP yourself. People will keep up-voting content they didn't even red.
You could remove the upvote button on overview page.
But people would just click the article and scroll down to up-vote, and still without reading.
If people really just want to up-vote articles without reading them there is no practical way of stopping that.
Hmm perhaps the addition of a timer could help.. And it would need to not be annoying, except for those people who scroll straight down and then upvote... The timer would take into account the number of words and assume you are a damn fast speed reader and work it out from there, only once the time has elapsed are you allowed to upvote and rate.