You are paying for a given usage profile, and the economics are based around that usage profile. A few leaches can exist for a given economic expectation, but beyond that everyone suffers.
Then, like I said, they should advertise they are selling "a usage profile" and not bandwidth. There are laws that protect consumers from being misled.
Leaches, wtf?
Should the power company be able too ban you from using the electricity they sell you to power a saw? If you do, are you then leeching from the other electricity customers?
Google isn't being misleading any more than a landlord. You can't run an auto repair shop in an apartment complex; they usually forbid that in the lease.
Just because you purchased 800 square feet (or 1Gbps), doesn't mean you can do whatever you want with it.
You are paying for a given usage profile, and the economics are based around that usage profile. A few leaches can exist for a given economic expectation, but beyond that everyone suffers.