No they don't. You don't appear to understand the purpose of termination clauses nor how they are written. They are not going to attempt to validate or defend their decision to terminate you, but simply their contractual right to do so.
It's a common type of clause, and one that's fairly well established in contract law.
I live in Ca. and my service is in Ca.
I fully understand those clauses. I fully understand contract law in Ca.
Unfortunately for them in Ca., those clauses that allow them to terminate service also requires them to prove you are in breach of contract and violated the TOS. So in Ca., just consuming data is not enough for them to terminate service.
Contract law varies from state to state and in Ca. breaking a contract requires the showing a breach. Ca. has some of the strongest consumer protection laws in the country.