“Hi I’m Johnny and I hack stuff” is how this video starts. It features Johnny Long who is well known for the Google Hacking Database. The video is from Defcon 15 and is an interesting insight into how much information an attacker can gather on you or your company by simply observing. Items like stickers in cars can indicate your profession, using laptops in public environments can enable someone to determine what systems you use and looking at documents in public can expose confidential information.
It is a very interesting and at times humorous video.