So we've all seen it make its comeback, but I never really used it. I think voting someone down matters even less than voting someone up, and not even worth the time. To me it actually signifies how butthurt somebody is by your comments, though it can be empowering to see, just like being blocked. Guess it's kinda kiddy-fied to me.
I think it's pretty pointless. I try not to use it at all unless it just something absolutely ridiculous, and even then I usually just respond with something just as ridiculous. It helps give anonymous people a "voice" about your opinion when most wouldn't write a reply out of fear or whatever.
Yes, especially when people downvote me without leaving a comment on it. It just shows how butthurt they are. Just like how I answered a guy's question saying he shouldn't be unfriending a girl who rejected him. Three bitter guys downvoted me as if they really know what the girl thinks LOL
The downvote button definitely can be used for that. I don't really use it, but I don't mind it being around either... until people downvote for silly things like someone saying their favorite color is blue. :P
I don't really notice it but it seems important to some so I leave them to it - There are many things on the site that I don't understand but if I don't interfere with other people doing what they enjoy, I hope they don't interfere with my enjoyment of the site.