Anyone who has been active on the Internet for more than a few minutes understands how much of the content on the web is marketing. New trends have been evolving for quite some time; now comes some serious targeted advertising in public places.
From Hemispheres magazine (published by United Airlines):
That is already well in place through Google which has this technology applied in its Image search. Hence when you put a photo in Facebook with your name Google can then use that to associate other Searches. Be careful where and what you put online.