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Personally, as someone who reads more than I'll ever likely post, I kinda prefer that in a way. One of my problems with reddit has actually been when big news breaks and you want to get a bunch of different perspectives on it, you need to hunt down posts about the news across several different sub-reddits. This also nips reposts (and the incessant complaints re: reposts) in the bud as well as promoting discovery. Kind of a neat bug if you ask me.