It would be much better to have a system that HIDES users content by default, than to delete it. Then, people scrolling all posts (including hidden) would be able to report mistakes in the system.
Funny side note: I mentioned a similar system to Reddit because they have huge problems with mod abuse now. I said, "Hey, just make mod deletions pseudo-deletions, so they're hidden unless you want to see them, so people can check mods and report abuses to admins."
They didn't even reply back. No politically-correct, "we appreciate your input, but no thanks." Literally nothing. Ellen Pao, you sneaky bitch. Seems like they know there's a problem and they either don't want to admit it, or they want it that way.
I really wouldn't be surprised if Reddit explodes the same way Digg did--through over-commercialization of "sponsered content", and outright censorship.