This is timely. Just yesterday, The Guardian reported that the British spy agency GCHQ has been collecting millions of webcam images through Yahoo. You know the little camera on your computer, the one you take selfies with? Basically, this report says that others may have been looking at you as well.
Here is the Guardian article: http://www.theguardian.com/world/2014/feb/27/gchq-nsa-webcam-images-internet-yahoo
There is a discussion of it on today’s Democracy Now: http://www.democracynow.org