I think you're correct.
Related question: do you hide your medicine cabinet keys from similarly-aged children? Our medicine cabinet key is kept on top of the cabinet, a relic of the days when that was definitely enough to keep drugs and young child separate. But now DS could certainly get and use the key if he wanted it, and I wonder if I should be doing something else with it. (But what? If I kept it on my keyring this wouldn't help unless I hid that, just as for the car case.) Having been a depressed teen, though, I think there's something to be said for better control, and would like to know what other people do.
