yeppers.... when our eldest was little, we lost him twice. After the second time, we put hooks and eyes on the top of the exterior doors. Silly tyke could open the rest of the locks.
Had some neighbors with the same problem with their eldest. They were lucky though. Their son would wander around and then come HOME. Once, one of the other neighbors tried to teach the kid a lesson, so he would stop wandering. The guy hid behind the bushes, and wShen the kid was walking past, he jumped out and yelled boo. Scared the kid silly, but he STILL kept walking off.
Dunno...none of the rest of my kids did that.
For both my eldest, and the neighbor's eldest, the kids were 2 to 3.