Feel free to call me crazy or paranoid, but sometimes I feel like the camera LED turns on briefly (for approximately 0.1 seconds). Maybe it's just odd reflections, or me confusing the LED for the camera itself with my peripheral vision, but it piqued my curiosity; how would I find out if some utility is turning on and off the camera very quickly to snap a picture? Is it even possible to do it that quickly? How would I diagnose this? Does something like this actually exist? 

Edit: Note, yes, I do know of the existence of trojans and so on. The point of my question is: as a sysadmin-level user (advanced), how can I perform this diagnostic, hard core? Also, the question about the timing is: when the camera is turned on by any utility, is it possible to turn it on, snap a picture, and turn it off in such a small amount of time? Does the driver allow you such a quick round trip?