0 to click (= choose) a symbol to show that you dislike or disagree with something you have read or seen on the internet: --
1 a symbol that shows someone dislikes or disagrees with something they have read or seen on the internet: --
Given all the responses and downvotes, maybe you should reconsider.
When one of my comments gets downvoted I don't take it personally.
It gets downvoted because it's disparaging people for no good reason.
If your natural inclination is to criticize a bad idea and downvote it, remember the ultimate goal is to encourage idea generation and idea sharing.
If all you do is downvote without offering a valid counter point then you're basically admitting your own ignorance.