Congressman Ed Markey has long been fighting the unaccountable and warrant-optional nature of modern domestic surveillance here in the United States. Market this week published the results of his letter writing campaign to carriers asking them how many times they hand over user information to the government, and under what circumstances those requests are made. The results show that roughly 1.3 million requests for user data were made last year alone, with Sprint topping the list at 500,000 subpoenas for data and 325,982 court orders for wiretaps or location data over the last five years.