Right. "His" property. Forgot. That's a different set of rules. Businesses aren't subject to reasonable expectations.
Yup, you've never heard of private property before. You can argue against an unusual measure that wasn't stipulated up front, just as the other party can bind you to "usual" terms that aren't necessarily specified in the contract. However, the terms of a contract can be anything, given that all parties consent freely. Many such cases are illegal, because our government doesn't respect private property. Laws against short-range jamming on private property are an example of such.