I read this tragic story a few days ago about an eight year old who sneaked out and took a joyride in his parent's car:

<< Wednesday night was like any other for the young family: The children’s mother gave them a bath and tucked them in bed around 9:30 before turning in half an hour later, police said.

But the children’s grandmother drove by the family’s central Phoenix apartment, noticed the front door was open and called to alert her daughter, police said.

The mother awoke to find her children missing, and began knocking on neighbors’ doors, searching for the kids. She noticed her car — a 2010 red Hyundai Elantra — was gone and called police to report a possible kidnapping, Martos said.

The children, meanwhile, were on an apparent joyride around town. >>

http://www.latimes.com/nation/nationnow/la-na-nn-phoenix-car-accident-girl-died-20130830,0,4772502.story

Then today, Charlie saw me open the locked front door at Bee's mom house... and immediately copied me! I had always thought of locks as a way to keep people out... I guess you also need a way to keep kids in. But what if there's a fire and you've childproofed your front door?? I guess nothing beats talking things through with your kids...

Anyway, back to the original question. Can your LO open your front door?