Searching for inurl:"viewerframe?mode=motion" gets you control of random webcams, but after you look at a few google pages, it blockes you for a minute and says that your a virus.

http://www.google.com/sorry/misc/?continue=http://www.google.com/search%3Fq%3Dinurl:%2522viewerframe%253Fmode%253Dmotion%2522%26hl%3Den%26rlz%3D1B3GGGL_enCA236CA237%26start%3D140%26sa%3DN

^^The URL of the block page

This well known feature generating this error page is also documented by Google nowadays:
http://googleonlinesecurity.blogspot.com/2007/07/reason-behind-were-sorry-message.html