We noted in June that the single most important thing you can do to protect yourself from government spying is to realize that the NSA can turn on your cellphone or laptop’s videocamera and microphone without you knowing. And see this.

Now that even the Washington Post reported that your webcam can be remotely activated and you won’t even know it’s on, awareness of this vulnerability has gone viral.

To give you an idea of how mainstream this concern is going, Mashable’s Lance Ulanoff made a short video to show you how to use a post-it to block your webcam (duct tape works, but leaves a sticky mess on your laptop if you ever want to take it off to start using your webcam):