I think it would be incredibly useful to have a "quoted by" button, to have easy access to the posts that quoted the post you're interested in. It seems like an obvious addition now that I think about it! It would help reduce redundant posts tremendously. It would also be a million times easier than scanning the thread for replies to a post, that cover the point you were going to make. It would be sooooo useful, and I'd rather not have to write a custom script for it. D: