> That’s a failure of the rule of law on two dimensions: we shouldn’t be the ones making that call, and no one else who should was stepping up in spite of being aware of the threat.
This is the logic of vigilantes. I'm not saying what you have done is on the same level as vigilante murder or anything, but don't try to justify it as something high-and-mighty. You've once again terminated a customer on a whim. And that's your right, but stop trying to make this out to be anything more than that.