Yes, but it's under-used, largely unknown and forgotten. It's a symptom of the human computer interface that your average user can't be bothered with a two click function.
Disregarding the negative vibe of giving a "terrible" rating could cause! I'd bet that more people would "like" a thread if a single click button were available, than currently "rate" it using the current system. As for "liking" comments, I can't see why that wouldn't work also.
Bookmarks