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Facebook has also used 'sponsored' stories, allowing advertisers to opt-in to generating ads with real people profiles (a face and a name) endorsing the ad. On March 18, 2014, however, Facebook eliminated the fact that this is a choice -- from now on, all ads may be delivered as sponsored stories.
Flickr: Alaskan Dude
How would you feel if mall security cameras didn't simply monitoring you for stealing, but instead kept tabs on the specific brands, styles, colours and sizes of clothes you tried on, the magazines you leafed through at newsstands, what you ordered from the food court, and everything you actually bought during your visit?
If you have a large control over an industry and can pay the fines, I believe your ads can claim just about anything. You can upset your customers, bite the hand that feeds you and still do business. If you don't have that industry control, you may want to be a little more truthful in your advertising.