I had my MBP open on a desk the other day while I was in a clients office just scribbling some stuff on the electronic whiteboard. I looked back to the laptop to check something and I'm sure it was a trick of my eye but I could swear I saw the green light blink off. Considering what I was scribbling was somewhat restricted information / schematics and the camera was effectively pointed straight at it I began to have some concerns. Usually the MBP is at home and all it gets is a blank wall and my ugly mug every once in a while - but I've grown slightly paranoid about it. I can stick something over it when I carry it out, but I do actually use videoconferencing quite often and it's inconvenient to unstick stuff. Is there a cover made for this purpose?