Underdeclaration of cable TV subscriptions is a major problem in some Asian markets, and also in other regions. One Latin American government, concerned about losing tax revenues from the cable-TV industry, has proposed revoking the operating licenses of cable-TV operators who underdeclare. See the story here:
http://www.advanced-television.com/index.php/2011/11/25/warning-issued-to-colombian-pay-tv/