And he would have some sweet grounds to sue your company on, since your stupid marketing team advertised it as an "Unlimited" connection, the contract doesn't actually specify that he can't, and he called and got confirmation from your company that he could use his connection to it's full ability. Great way to get his internet paid for for years.

-False advertising -Breach of contract -Theft -Racketeering?

and if I were a manager I would fire the ass of my sysadmin if they unilaterally acted in contravention to the contracts we have with our customers ¯\_(ツ)_/¯

good thing for everyone, here you're unemployable.