If Google Calendar thinks it’s OK to set a 500ms animation on opacity for event edit dialog - then it doesn’t seem like a 1 sec spooling for a webcam is too much :)

I’m not being snarky, and we’re not talking about some random device you have. We’re talking about the camera on a Mac. The bet is that you can’t turn it on and off so fast as to be un-noticeable because there is a noticeable delay between that light turning on and getting an image from that camera. So I’ll gladly take the other side of that bet.