Complying with the law!
Most countries around the world have laws to protect consumers (that's you, me and your future customers!) from unscrupulous business practices like false or misleading claims, breaches of privacy and spamming. Each country's laws differ in the detail but the fundamental principles are similar.
While no one expects you to be a lawyer, consumer protection bodies (such as the ACCC in Australia and the FTC in the United States) expect anyone selling to consumers to be familiar with the fundamental principles of consumer protection laws. A similar approach is taken by the bodies that enforce privacy laws and anti-spamming laws. These regulatory bodies have the legal power to investigate and prosecute breaches and ...