People are funny. Probably most do not want to be recorded without their permission, but many of them will think of situations when they want to be the one sile

People are funny. Probably most do not want to be recorded without their permission, but many of them will think of situations when they want to be the one silently recording. And some of those situations would actually be valid, recording cops for example. So, unless there is a law, I can't see forced LED for recordings. If Google tries, then one of the most popular apps for Glass will be a hack which deactivates the light.