Many feel unsafe speaking with their families, knowing authorities are listening.
Angry citizens oppose the tactic and fear that such investigations could be more widely implemented.
Residents of the isolated nation are accessing the broadcasts on compact electronic image devices.
Seoul will provide thermal scanners for the Kaesong joint industrial complex.
Sources say customs agents likely permit the products on official order.
Some students were sent to labor camps or forced to work at construction sites.
Officials have concealed the incident because Kim Jong Un wants crude oil and food aid from Russia, one source says.
Public executions are common, with gruesome methods frequently used, sources say.
They say the regime leader is exposing the country’s technology.
The move reflects worsening relations with China, source of many foreign movies, residents say.
Sources say Kim Jong Un ordered it closed to prevent news of the break out.
Hyon Yong Chol, accused of disloyalty to Kim Jong Un, was killed by anti-aircraft fire while hundreds watched on April 30.
They ask for strengthened units amid growing numbers of assaults by soldiers and civilians.
Most citizens believe the propaganda to be true, while those who have access to outside information know authorities are bluffing.
The 16 people fled the country during a “special monitoring period” for citizens.
Shortages in electricity and raw materials have held back production, sources say.
They are pulling people off the streets for minor offenses and forcing them to do unpaid work at construction sites.