On the Internet, Nobody Knows You’re a Dog

From the business.gov web site:

Online Advertising Law

An old cartoon in the New Yorker showed two dogs in front of a computer, and had the caption “On the Internet, Nobody Knows You’re a Dog.” The inherent anonymity of the Internet has fostered a number of shady advertising and marketing practices, such as unsolicited e-mail spam. Over the past decade, federal and state governments have passed additional advertising laws that protect consumer privacy and ensure fair and truthful advertising practices online. If you plan to advertise online — whether you’re buying ads on search engines or direct marketing through e-mail — you’ll need to understand some basic rules.