It might, but then you’ve created a whole new set of problems: if anyone can take down anyone else’s content with one click, they’ll do it against anybody they dislike just for the hell of it (this was the case on Tumblr for a brief period: the Report button almost automatically banned the user, until they immediately realized this was unworkable). So if you don’t want everyone to ban everyone, you need a moderation team anyway to handle false reports, and you’re right back where you started.

It’s probably now a lot easier to detect porn and automatically reject it. Set the filter to lean towards rejection for edge cases. You will lose out on racy bikini pictures, but maybe that is an acceptable compromise.