The best satirical stuff I've seen in recent years has been the mockumentaries by that same group of people who did This Is Spinal Tap. Let's see, they also did Waiting for Guffman (haven't seen all of it), A Mighty Wind (very funny), and Best in Show.
I haven't seen any of the current parodies, but then it's because I haven't seen most of the movies they mock, and you're right, they clearly aren't working very hard at it anyway.
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