Well, it's idiot proofing. Can't burn a laptop if the plug didn't go in. Or the jet fighter flashed red 3 times and refused to take fuel. I actually had done i

Well, it's idiot proofing. Can't burn a laptop if the plug didn't go in. Or the jet fighter flashed red 3 times and refused to take fuel. I actually had done it once. It was a 9V adapter into a 12V device. It worked for ~180 seconds, then LCD inverter melted dead from overcurrent.