Comment by pclmulqdq

The extreme condition you are talking about often will be unenforceable. It doesn't stop people from trying, though.

Generally, contracts on the US where there is one party who writes them and another party who doesn't get to edit them (leases, employment contracts, etc.) have a lot of case law about what can and can't be enforced on the party who doesn't have authorship control. Contacts where both parties are writing them have a lot more freedom to screw a participant, but also generally savvier participants.