Check your mute words security filter. I can't mute "mostr.pub" (or any word for that matter), which was the most effective way to get that cockknockery out of my feed.

I also can't individually block people, which is also fucking lovely.

I can add relay.mostr.pub to my relay block list, which mitigates the situation somewhat, but any hashtags I follow ignore that rule, so #photography is now full of mostr reprobates.