If the mere mention of your idea/product is all it takes to rip you off, you're already screwed. There has to be something else that differentiates your company other than simply the service/product you are offering. This can be a whole laundry list of items but ultimately, there has to be something other than simply the idea to sustain your business, otherwise you're going to lose. In my mind, entrepreneurs are too paranoid w/ other business stealing their ideas. Don't worry about them stealing it, worry about when they stop.