Has Anyone Ever Had Their Magic Bound?

I met a new friend who turns out is a coven leader and I got really excited about it. He said I could join and I was all up for it til he started talking about some of the beliefs and rules of the coven. There’s a bunch I’m pretty iffy with since I’m a pretty gray witch and the coven seems snow white. But the main thing that I didn’t like is that they said it was their responsibility to bind witches they thought were dangerous. I was kinda like “mmhmm sure ok. tell it to the charmed ones.”

I never really thought of magic as something that could be taken away so it didn’t bother me at first. But I don’t actually know anything about it. Has anyone here ever bound someones magic? or had their own bound? And is there a way to unbind or protect yourself from being bound?