I don't get it... On any other type of RC model, once you plug in the battery, it's "armed." That's the reason throttle lock exists. A powered model is inherently dangerous. A multi just has more props to chew you up with...
If you treat these things like toys, play around unsuspecting kids/people/animals, and get distracted easily enough to forget you have an armed death-machine sitting on the lawn, then it's just a matter of luck/time before you cause a serious "accident."
-Max