We've been through the general arguments against it for 5 pages now, but you're new to the conversation little girl here are my main points:
I assume you're addressing the child in the .gif? I didn't know she had posted in this thread; she's too young to join the forum.
- Because both things interfere with each other. The moment I see the first "People seem to agree with me, see the like-count of my post!"-comment in these forums (assuming the like-system ends up being used that much) I'll link it here. They're certainly part of any like-enabled forum I've ever been active in.
I expect it will be used more and more, as people get used to it. Don't tell me that if you get an "alert" message telling you that you received a "like" from someone, that you won't feel at least a tiny bit pleased. It's an unobtrusive nod of agreement from someone, and since the "like" total is only visible by clicking the poster's profile, it's not as though it's part of your sidebar information that's publicly visible to everyone.
Most of the time not posts that are "high-quality" get likes, posts that spark an emotional reaction gain likes. That creates several problems, for example:
Like-whores who create comments for no other reason but to "be funny" and get likes
You never know what will garner "likes." I belong to TrekBBS (large Star Trek forum comparable in size and membership to CFC). That forum switched to Xenforo earlier this year from vBulletin, and yeah, there were problems. But people took to using the "like" feature right away. You can even "like" people's "status posts" - located at the bottom of the forum here, but to the right side at TrekBBS. This is what's taken the place of "visitor's messages", btw, so I suggest that you (general "you") never post anything there you don't want everyone to see.
Unfortunately, at TrekBBS, there are people who also "like" troll posts (that forum's moderation policies are quite a bit more lax than CFC's), and some people engage in obnoxious "high-five" kinds of "like" actions. Still, chances are that those people are already on my ignore list there, so that's the only evidence I see that they even exist (the Xenforo "ignore" feature is more thorough than vBulletin's) and it's much easier just to shrug it off.
Actual High-quality post may be lost between highly-liked joke-comments
People may be discouraged from posting their opinion when they know their opinion is not the one the majority agrees with (because getting less likes than everybody around is about the same as getting actual dislikes)
This can be true. However, if one's will to have one's say is strong enough, go forth and post anyway. I've had a bizarre number of downvotes on CBC.ca at times, just for saying that teaching is an honorable profession (the downvoters are those who hate our current Prime Minister - whose profession before entering politics was teaching). It doesn't stop me from expressing that view elsewhere on that site.
(And one nzcamel's Post made me add:
- It robs you of the chance to have your opinion changed if all you do is upvote 10 posts instead of taking part of the discussion)
You never know what will change a person's opinion. I've upvoted a post sometimes because the person posted a link to additional information that may very well have resulted in me changing my mind on an issue, or at least learning new and interesting things.
But no, before that part of the discussion starts again: Obviously none of that is a "big deal" on the grant scale, but so are the benefits of the like-feature not "big deals". It's about either a small change towards the negative or a small change towards the positive. I think it's towards the negative.
I've been on a forum that used the "reputation" system. Green = good and red = bad. One thing I found out eventually was that there was a hidden forum that had certain requirements to access: membership for at least 2 years, a postcount of 3000 (easy to get here; not easy to get there, since that forum had a strict no-political/religious discussion policy and serial threads were not encouraged), and a minimum reputation score (I don't recall what that was). The problem was that if a member's reputation score dipped below that threshold, the hidden forum would be hidden once more, and the member wouldn't have access to their own posts in that forum.
Were there cliques of people who took advantage of this? Oh, yes. Actually, one of the admins lost his position when he was caught abusing his authority by "adjusting" one of the members' reputation scores downward by 12,000.
Could something like that happen here? I really don't think so, and that's not just because we don't have that kind of system here. Yes, there can be abuses, and there are things that need to be worked out here - for instance, what happens if someone "likes" a post that either has been, or will be, infracted for trolling/flaming? Will the person who "liked" the post also be infracted for trolling/flaming?