Anything illegal where you or the other member live.
Weapons, ammunition, explosives, or parts for them.
Drugs, prescription medicines, alcohol, tobacco, vaping, or cannabis products.
Adult, sexual, or escort services.
Medical, dental, or mental-health treatment, legal advice, or financial or investment advice, unless you hold the required license and it's lawful to offer it this way.
Licensed work (such as electrical, gas, plumbing, or other regulated trades) when you don't hold the license your area requires.
Gambling, lotteries, or games of chance.
Counterfeit, stolen, or recalled goods.
Hazardous materials or work that requires special permits you don't have.
Collecting or selling other people's personal data.
Spam, pyramid schemes, multi-level marketing, or anything designed to recruit people into paid programs.
Childcare or elder care without being upfront about your experience, and without the other family verifying you themselves. Follow your state's rules.