Currently, MRFs availible by default are:
* `Pleroma.Web.ActivityPub.MRF.NoOpPolicy`
* `Pleroma.Web.ActivityPub.MRF.DropPolicy`
* `Pleroma.Web.ActivityPub.MRF.SimplePolicy`
* `Pleroma.Web.ActivityPub.MRF.RejectNonPublic`
Currently, MRFs availible by default are:
* `Pleroma.Web.ActivityPub.MRF.NoOpPolicy`
* `Pleroma.Web.ActivityPub.MRF.DropPolicy`
* `Pleroma.Web.ActivityPub.MRF.SimplePolicy`
* `Pleroma.Web.ActivityPub.MRF.RejectNonPublic`