Are there any laws on just throwing your signal across large distances and polluting the airwaves??
We are starting to use a new technology at work with Cisco AP's and Cisco wireless controllers called "Cisco CleanAir" whereby the AP's can "see" each others signal and dynamically adjust their power/output against a map so their only spread signalling within the restraints of the office/site.
Kind of the opposite of what you're trying to do though