If Americans aren’t disturbed by phone carriers’ practices of handing over cell phone users’ personal data to law enforcement en masse–in many cases without a warrant–we might at least be interested to learn just how much that service is costing us in tax dollars: often hundreds or thousands per individual snooped.
These Are The Prices AT&T, Verizon and Sprint Charge For Cellphone Wiretaps - Forbes

i found this interesting; something i've wondered about myself.

in response to the story, several telecom companies denied selling data or making a profit from the data access.