St should be able to if said person is misusing the lore or not acting in good faith, I mean. They are the ones handling the lore imo. They should gather enough proofs to see who does bad or good with it as already happened in the past.
For your second bit, I shall rephrase what I meant, I apologize. It's fine if they get disconnected whether it's unfair or not but don't you think losing slots is just an overkill? Moreover, people could start to disconnect others IC because there's conflict between covens and it could just lead to more drama and eventually the magic getting shelved, like the siliti did; and their excuse would be "it makes sense for my character" as there are not rules like templarism and etc. All I'm saying is, sure, disconnect that person if they truly deserved it but losing slots for it? A bit too much. It's already a decision forced by 4 people onto someone against his will ooc, it's bad enough as it is. Just disconnect them and have them barred from the magic, don't take away the slots if it's truly UTTERLY needed to have a disconnection ritual for a magic.