We do that all the time, of course—just not enough to satisfy those who would like (a lot) more. But we have the rest of the community to think about as well.
Do you have any data on what tends to get inappropriately flagged?
I'm not sure if it would be productive to share such information, but can't help being curious about it.
I can't really answer that because it's not clear what "inappropriately" means. Everyone seems to have a different definition!