I ruined my cats’ toilet time with a motion-activated neon litter box sign

My two cats live a refreshingly low-tech lifestyle. They've never experienced a robot litter box, an automated feeder, or a GPS tracker. Noodle and Loaf live blissfully unaware of the technological trappings that surround the rest of my life. Except, that is, for the glowing neon sign that turns on whenever they go to the toilet. I can't, and won't, take responsibility for the "On Air" sign. It was my partner's idea, suggested - I thought - as a joke. That was until it turned up at the house…