Prevent negative voting - make voting easier.

I don't want users to be able to "downvote" an idea with a negative vote. Not sure if there Is a already a way to disable this.

Also, If you prevent negative voting, then you would only need a single vote button. Right now. clicking on the vote count does nothing. It should increase the votes. The whole process in not intuitive. I think a single vote button is better. Similar to other sites. Like FaceBook has a "Like" button. After you have liked it you can "Unlike" it. One button, that's it.

You have the text: "vote" under the vote count, but when I click on it, I can't vote.