I just tell them no way! And then I explain to them that it cost me hundreds of dollars and many many hours to get to the point where I could actually fly the thing around, and although it may look easy to them, it most certainly is not. Most people understand, especially when you tell them how much money you've put into your heli. I don't even want to fly my friends helis even when offered because even though I'm confidant I won't crash it, I don't want to be responsible for trashing someone elses stuff.