It would be nice to vote up good posts and downgrade bad ones.
I think there is a reason why its not esed here - what is it?
What did u say?
Hell, why would you just want to see a like or dislike on a post? This is a forum, and it's not like you have to be smart. Your trust will speak more about who you are and how you work than just having some likes or dislikes. I can be dumb as a brick but if I can be an effective escrow service and be 100% accurate and efficient with business I do, then that's more important than my likes.
Look at Reddit. The single best example for this entire system.
If you speak from the narrative, or you don't agree with the popular opinion, you just get downvoted. No explanations, no debates, it's just "No, I'm right, and these internet points prove how much people agree with me, so I'm right", leading to an appeal to popularity and bandwagon logical fallacies.
As for all the cool kids are doing it, that's actually not true anymore. Facebook (and by extension its like feature) is on the decline, and 4Chan (despite the cesspool of bullshit, thanks to being entirely free-speech-based and every posts existing on its merit alone) is on the rise, however it will never get as big as Facebook for obvious reasons. Snapchat doesn't have a like or dislike feature, but that's the new cool thing.
Like/dislike functions take away from legitimate discussion. If people can just say "I don't like what you think, here's a -1" and never be required to explain why, that's what it becomes. Hell, just look at reddit's /r/politics if you want to see this in play. If you don't agree with the narrative, expect hundreds of downvotes, but only maybe a half-dozen individual responses.
There is no enhancement beyond people declaring "look at how many likes I have" and just becomes another extension of attention whorishness. All it means is that more people agree with them, regardless if they're right or wrong. It's an appeal to popularity, and will make users believe that they are better than other users much like how the quantity of Facebook friends would inflate egos just under a decade ago.
Going back to what I said in my earlier post, there are many instances on this forum where I have seen two users get pissy at each other for something that happened in another thread. Like/dislike buttons can lead to just serial dislikes easily. Again, see reddit as an example for this.
TL;DR It inflates egos, does not enhance anything beyond making it easier to appeal to popularity, and takes away from discussion and debate by simplifying discussions into "no, I don't like that. -1" while there are more complexities to be had.