I agree with DocJohn on this.

I was a member of another "support" site that has taken on the like button. It seems to add a sort of high school clique-ish sort of feel to the site. You have people kind of formulating posts in hopes of swaying a certain "element" of the forum and racking up likes. Then another may speak for the opposition. It seems that the side that wins is the one that gain the most likes. It adds a bad emotional/social element to the mix.

I like that they don't have the like and dislike button. I also like that they don't do popularity contest such as "poster or chatter of the month". Those things just make a lot of people feel more alienated and defective.