From skimming quickly, it sounds like they have a full reputation system, and the ability to downvote posts, not just a Like/+1/Upvote. It also sounds like they may feed back into how posts are displayed, although I'm vague on whether that's ordering rather than most-recently-active as things default to here or just showing red vs. green count on the main forum page.

If the idea here is to go full-hog to that sort of system, I agree that it's not a good fit for FT, and probably not a good idea. We don't really do "directory" content of that sort, except maybe on the Mileage Run/Hotel Deals forums and CC.

I think the main question is "what's the intent of this feature, and how will it be used?" -- my own preference is for a limited form, basically to improve signal to noise of +1 posts, and improve engagement for people who don't post a lot. The more elaborate it gets, the less I support it; in particular, since we're not screening things (well, maybe a bit on the MR/Hotel deals, but I rarely use those) there's absolutely no benefit to down-voting.