I saw something similar, though far less sophisticated, at the start of the pandemic. Universities all started doing online exams where students had to have the

I saw something similar, though far less sophisticated, at the start of the pandemic. Universities all started doing online exams where students had to have ther microphones active the whole time, so a bunch of CS students got together and made a little script that added noise, randomized echo (so echo cancellation didn't work), dog barks and that buzzing sound that GSM phones used to make when next to speakers. After the first few exams, the microphone requirement was lifted. Another fun one was a script (actually just a gstreamer chain) that intentionally garbled your camera's video stream, since another exam requirement was a running wide-angle camera (sometimes two!).