HN Feature Request: being able to fold comment threads

I mostly browse the actual site and don't use 3rd party apps to read HN. More often then not, when a particularly long thread has run its course and turned into a flame-war or moot debate, I find myself scrolling away (sometimes for a while) to get to the next root comment.

I realize this isn't news to anyone, and I'm probably not the first to bring this up, but it'd certainly be convenient to be able to fold a block of comments and move on to the next with a click (much like, err, Reddit).

Just saying.

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EDIT - I can see this feature has been discussed before: http://www.hnsearch.com/search#request/all&q=fold+comment