I think we need one for really like (or love or whatever), really dislike and maybe one for you're being a DYKWIA or w@nker - any feedback
Dislike buttons not a good idea.
AFF Supporters can remove this and all advertisements
I think the "like" is enough. Putting anything along the lines of negative feedback (dislike, etc.) could prevent some users from contributing.
I agree there are enough negative comments on here, without making it easier to throw shade.
One option could be a thumbs up/thumbs down model like on OzBargain. Posts that get below a certain threshold get automatically removed. I would think that the comments that would get a thumbs down are the negative comments people make against others opinions, so it might curb some borderline bullying or intimidating behaviour?