For the listed above reasons I don't think it will be an useful addition to the community - it'll just make it a less peaceful (than it already is) place to exist, besides I think its better people have to respond to things they dislike because others (and devs) could see their reasons.. if those reasons are any good / bad or even if perhaps they can use those reasons in conjunction with other ideas to make their own version of a solution better (in their mind).
Dislike is more just for people to feel good that they're dog piling someone / the person they think is dumb is dumb to other people too (while not always mob mentality, and not suggesting that's why you want it, it is still a great place for the mob mentality to exist, and people part of the hive, imo, are usually less logical and reasonable ones to listen to - even if technically the hive is correct).
Could always add a way to respond without bumping the thread though lol, if you didn't want to help keep it alive but still provide feedback on the perspective (disagreement):P.
