I'm leaning against the user flagging model of content moderation because it keeps the incentive for bad actors to try to game the system. Bad content, even briefly included can still do a lot of damage. It's like spam email -- even though something like 99.9% gets filtered out, that 0.1% is still valuable enough for spam senders to keep trying. If the problem of spam is just a numbers game, then bad actors will just increase the volume to compensate.

The problem is that it can also be gamed in the opposite direction. Anything automated gives a way for hostile third parties to disappear links at will, which can be similarly damaging especially if timed right. YouTube and many other sites with automated DMCA handling for example have major issues with this.