What is this "wild west" nonsense? While there may not be any e-liquid specific regulations, it's still a consumer product being manufactured, sold and consumed in the US. You can't just put anything in a liquid, if you put something known to be harmful in, and it harms someone, you'll get sued. If someone gets sick from your negligence, you'll get sued. There is no "wild west" in America, just some areas that haven't been hit by bureaucracy yet. Don't worry, the regs are coming, soon you'll have nice and safe "tobacco" or "menthol" flavor, in sealed cartos, brought you you by those who care about your health, Philip Morris and RJ Reynolds.