How can you turn on someone's webcam?

creeeeeeeeep!

yeah. their is a PC program that was designed for security web cam purposes but people have used it now for turning on any web cam they want, the bad thing is that especially laptop don't have lights when they are on, someone could be watching you now.... it take about 10mins to turn them on/off... it does not even give you the ip address of which PC turned it on.