Probably splitting hairs here, but I would specify untrained non kiters. I get your meaning though. People who have no clue about the kite. My wife is a non kiter, but she can launch, land, and move a kite better than most first year beginners. I taught her in light winds, but now she is completely competent in any wind, and better for me than a stranger (even one who kites) because she is predictable (I know what she is going to do, and she knows what I expect).
On a beach with a lot of other kiters this summer, I watched peoples reaction as my wife would launch and land my kite. It was kind of funny but I get their concern (which quickly disappeared once they saw she knew what she was doing). In one case as my wife went to lift my kite, some guy jumped up and offered to take the kite and gave her a little speech about how unsafe it was for her to launch the kite. She gave it to him and didn't say anything and when I asked her about it later, she said she didn't care and figured that would keep other people from asking her to launch them while I was out
Anyway, the guy was kind of a noob and let my kite go while I was twisting my swivel without a thumbs up.
I guess my point is that predictability is also an important safety factor, so when in other than your normal area around people you don't know, maybe have a brief discussion before the launch.