TIL there are people on youtube who make fake "emergency alert" videos using valid Emergency Alert System tones. Aside from being almost certainly illegal, this is a supremely dickheaded thing to do. I know it was drummed into my head as a radio DJ in the 90s that the EBS (as we had back then) was only to be activated in event of a genuine emergency, authenticated with codewords sent over the AP wire and cross-referenced with a regularly rotated list of valid words we had on hand. The potential for mass hysteria and panic if an invalid alert was sounded was just too great.
Anyway, I'm not surprised. People are jerks.
masto instance for the tildeverse