Unlike many successful startups* (Zynga, Facebook, etc) I turn down ads for weight-loss scams, mesothelioma, etc all the time. It sucks because there are a lot

Unlike many successful startups* (Zynga, Facebook, etc) I turn down ads for weight-loss scams, mesothelioma, etc all the time. It sucks because there are a lot of them willing to pay. But years from now, I won't remember the cash. I will remember that I contributed to the victimization/extortion of others. As an aside, I see no problem with payday loans, arms dealing, or the like - there is nothing inherently unethical about the businesses. They both offer ample opportunity to cross ethical lines, but that is a choice, not something that is inherent in the business model. It's like Experian - there is nothing wrong with their business - except that they rely on trickery to get people to sign up. There is a difference between an unethical business and a business that is operated in an unethical manner. *Note: I don't believe that the choice to engage in scam advertising is what made these companies successful. I think it is a rationalization of poor behavior on their part.