I agree, they are basically serious toys just the same way a boat or motorcycle would be a toy. I don't that the general public quite understands the size, performance and complexity though. They think of some $39 thing that their kid had, not a serious aircraft. Not that there is anything wrong with those $39 toys of course, I've been known to frustrate the cat with some toy helicopters.

If people say you need to grow up, just find out what they are into. I'm sure it is cars, guns, fishing, golf, computers, bicycles, cooking, woodworking, video equipment, cameras, painting or something. Then tell them to grow up and get over that stuff. Sometimes that helps them get it.