Lights in the car at night indicate distracted driving, which IS illegal. The lights aren't.
Swimming and cramps is a real thing too. Just predates the normalcy of swimming pools where you just put your feet down if you're tired. Ever seen a floating swim dock? Usually about a quarter mile from shore. I've rescued swimmers myself off those things.
And CRTs literally emit x-rays, so yes, don't sit with your face right up to them.