You can enforce penalties (bans for the entire brand/domain/etc) to deter gaming the system, which should take some pressure off the humans which can then focus

You can enforce penalties (bans for the entire brand/domain/etc) to deter gaming the system, which should take some pressure off the humans which can then focus on the top issues reported by end-users. It won't be perfect, but at least Pinterest wouldn't be polluting image search for years for example.