“The IC, which also includes the parts of the FBI, DEA, and DHS, and various DoD elements, has deployed ad-blocking technology on a wide scale, according to a copy of a letter sent by Congress and shared with Motherboard.”
The intelligence community blocks ads at the DNS level across its networks. Ads deliver malware and leak device and location data to anyone who buys the bidstream. The agencies protect their own machines and leave the public exposed. Install an ad blocker. The spies did.