>What is stopping them from blocking all cellular signals or worse charging cellphone companies for the signal travelling through their space? Cell phones use

>What is stopping them from blocking all cellular signals or worse charging cellphone companies for the signal travelling through their space? Cell phones use licensed spectrum. If you want to operate a jammer, you're going to need permission from Sprint, which they're not going to give you. Now, if Sprint wants to operate a cellphone tower on your property, then you can charge them out the nose.