I'll add that if they're a legitimate site they'll be mortified but if they're an illegitimate site, they'll quickly move to open up shop somewhere else.
That said, if they're costing you money because of your sentry issues or causing you support issues that you can document, you have just cause for a lot of actions.
That said, if they're costing you money because of your sentry issues or causing you support issues that you can document, you have just cause for a lot of actions.