18. Jackson Nicoll as Albert, Fun Size (2012)
Certain filmmakers think audiences will get a kick out of watching bad, independent kids do wild and crazy things and make life for everyone older them a living hell. That's true to an extent, but there's a fine line and it's looking like Fun Size crosses it.
Younger siblings are useful on Halloween if you're just over the trick-or-treating age but still looking to score some candy, yet missing out on the festivities because your unruly younger brother is running loose on the town is a real nightmare.