We do have this API already actually: https://github.com/matrix-org/synapse/blob/master/docs/admin_api/user_admin_api.rst https://github.com/matrix-org/synapse/

We do have this API already actually: https://github.com/matrix-org/synapse/blob/master/docs/admin_api/user_admin_api.rst https://github.com/matrix-org/synapse/blob/master/docs/admin..., but it needs UI hooked up to it (and it should probably be in the spec rather than synapse-specific). Agreed that we need more moderation toolsnin general though; we’re working on it.