misleading and deceptive marketing for financial gain, can be pursued as federal crime, in some rare cases international, so the worst thing can happen is FTC and attorney general gets involved, your assets frozen, criminal and civil charges filed against you, and you go join Madoff.
All it takes is one really pissed of costumer to start this, and do not think you can hide behind fake names, servers, proxies,disclaimers and stuff. Trust me, I know, "close partner" had attorneys knock on the door for copyright infringement and misleading advertising even when it was thought to be all covered and safe. Almost all money made went puff to defend the case and reimburse costumers(even costumers never complained-but third party (attorneys) contacted payment processors. Was not as bad as deal was made just not to do it anymore. On the other hand this is BH forum and we all done our fair share of similar things. As long you don't get GREEDY and don't live next door to F.B.I, chances are rather slim that will happen. Nevertheless try to act responsibly. And NO, you are never 100% safe.