Your service my be legitimate (though I'm not sure about that) but you come off as someone with a poor sense of decency. Why would you tell off people who want to know more about your service. Wouldn't prospective customer doubt your ability to meet their expectations? What if in the course of using your service they need to ask about what they're not sure about? Would your response to them be any different? I suggest that you learn basic customer management before starting a service. Good luck.