The only thing remotely close to this scenario I've seen is when one of my radio station clients thought they could speed up their computer by turning on the built-in WiFi connection on their desktop PC, while it was still connected via Ethernet. A few hours later, they complained they lost the Internet, rebooted the DSL modem, got service back, speed got slowly worse until it was dead again, etc. Told them to disable the WiFi in the desktop PCs, which fixed the problem. I explained to them in broadcasting terms they understood, that they had created a feedback loop by doing what they did.
