In How to handle crankery on MathOverflow 2.0? Andy Putman pointed out that he flagged a post as low quality, but it never reached the low quality review queue.
I feel that in order to effectively handle cranks, or generally low quality posts, whenever a user (with sufficient reputation, maybe 1k?) flags a post as low quality it should be immediately added to the review queue.
I feel that this would be a good feature, at least on MathOverflow, but probably on MSE as well (I don't use other sites across the SE networks, so I can't say much else).