My family had a small manufacturing business that went bankrupt years ago. At one point we were making a part that ultimately ended up on a WM product. Periodically WM's folks would come around and do a strong arm routine trying to renegotiate the contract. It got bad enough my dad adopted the habit of bringing a couple of the very burly folks that worked in the fabrication shop to sit in on meetings and reduce the intimidation BS.
They are a ruthlessly scummy business and have been for a very long time.