Customers don't actually belong to anyone, you know. None of the vendors I have purchased products or services from have my permission to act as gatekeeper for communication with me, and as such have absolutely no right to act in that capacity. If I learned that a vendor had threatened someone for contacting me, that vendor would never receive another dime from me, and I would investigate whether I had any legal cause of action against that vendor.

Any notion that a third party could threaten someone for communicating with me, or even the notion that someone should go through a third party I have given no gatekeeping-like permission to, is offensive to my basic dignity as a human being.