Totally disagree!
I think it’s a great way to reinforce another members post without having to add another post to the thread yourself.
I mean sure, if there’s more to add on the topic then you can quote or reply, but if you don’t have anything to add but like/agree with another members post I don’t see any reason why clicking “like” is a problem.
It helps show other people reading the post that the first members post is supported by other members. Same with the “disagree” box, if somebody posts something that isn’t right and collects a few “disagree’s” then someone looking at that thread in the future knows they may need to take that post with a grain of salt.
I think the “disagree” button should be used sparingly since it does tend to trigger folks, but that’s the way it goes. It’s like reading a review of an item online, there will be positive and negative reviews and you have to sort for yourself which ones are most accurate.