Not the CIA, the NSA does this all the time. The documents that Snowden leaked confirmed that the agency intercepts hardware being shipped to targets and swaps out the firmware to allow them to listen in on all network traffic going through that device. They also work closely with ISPs to install devices that mirror all network traffic going through that ISP to another device so they can log and analyze it.

Ah yes, “ve ver vikings” or “We wuz kangs” for white trash and neo-nazis.