If it's mass reporting by a bunch of hivemind idiots, you don't necessarily need to ban them. Actual humans are expensive for a service to get, so I wouldn't expect any company to discard value like that.
But they should absolutely flag those accounts and reduce the weight of their reports, so it's worth less and less to the algorithm for mass reporting. They might even manage it by category, so they ignore reports from these accounts for 'Hateful Conduct' but still listen to them when it comes to reporting spam, CP, or stolen content.
If it's mass reporting by a bunch of hivemind idiots, you don't necessarily need to ban them. Actual humans are expensive for a service to get, so I wouldn't expect any company to discard value like that.
But they should absolutely flag those accounts and reduce the weight of their reports, so it's worth less and less to the algorithm for mass reporting. They might even manage it by category, so they ignore reports from these accounts for 'Hateful Conduct' but still listen to them when it comes to reporting spam, CP, or stolen content.