The recent thread about this buttons got me thinking: Every time there is a like/dislike button thread, there are a number of people who are thrilled to find out they can be turned off somewhere buried in the settings nobody ever looks at.
I think it would improve the user experience if this choice was made obvious on a one-off for every user. Coincidentally there is a banner for every user saying "please reset your password".
Wouldn't it be a good idea to give every user a one-off banner which says "like/dislike buttons" and offers "keep on" or "turn off" or "turn off dislike only"?