I was the oldest, with my sister being about 2 years younger than me and my brother about 5 years younger than me. I was always left in charge when my mom went out to get groceries on Saturday, and it was up to me to make sure all the chores got done. My sister and brother did nothing but fight and make things harder, so once when I was about 13 or so, I sent them to their rooms, which happened to be right next to each other with the doorknobs right next to each other, and I got a good length of twine and tied their doorknobs together so they couldn't open the doors. I got all the chores done myself in about 15 minutes and was watching tv in a clean, peaceful house when my mom came home....well, peaceful except for the "let me out of here you bitch!" yellling from the two bedrooms
I know it was dangerous if there had been a fire or something, but they could get out the windows, and frankly with them locked up the chances of a fire starting were pretty low
Another time my dingbat aunt was babysitting us, and she sent my brother (who was maybe 6 or 7) to his room for some reason. When my mom came home we couldn't find him! He was nowhere in his room, nowhere in the house, it was like he had vanished. It was a small house, so we would have noticed him sneaking out...my mom was panicked, my aunt was frantic, and my brother...had removed the bottom drawer of his dresser, climbed into the dresser, and pulled the drawer back in behind him. His room was always a mess so a half-open dresser drawer was nothing unusual. The whole time we were running around yelling "Josh! Josh, where are you?!" he was laying in there giggling his fool head off (quietly, of course, though that's how I finally found him - I heard him laughing). That was the last time dingbat aunt babysat us.