This is potentially terrible precendent essentially allowing private entities to write federal law.
Step 2: Catch someone violating it
Step 3: Sic the Feds (government) on them for violating it (your private, unvetted agreement).
(no comment from me personally, but I think that's what the GP was saying.)
I'm going to have to slap a [citation needed] on that.
There's no giant sign hanging over the breaker box in my building's elevator room saying "AUTHORIZED USE ONLY", but I'm pretty sure I'd get in trouble if I went in there and started flipping switches.
Edit: doesn't have to be wifi.