This is the issue I have with requesting a like button, an easy way to appraise and interact with posts and threads that you may not have anything to add to.
A UK forum called TheFretboard has things called 'frets' which allows you to give a 'LOL' 'WOW' or 'Wisdom' for each post (although only one per person per post).
They used to have 'facepalms' there too but that saw people bullying anonymously.
You also see people 'fret-whoring'- that is making egregious posts simply to get people to give them LOL's or WOW's- it can be pretty juvenile.
Basically, whatever system is implemented some people will like it, some will hate it.
Some will play nicely, some will find some way of using the process to be crappy to others.