Best drama movie stupidity of 2017

Stupidity: While Mr. Butler was upstairs taking a shower, Lucas goes into his house, kills his wife, and takes the baby to the school (into Mr. Butler's classroom). Lucas wanted to take away Mr. Butler's family, so all he needed to do was also kill the baby at the house (or leave the dead baby outside on the porch for Mr. Butler to panic while searching). Lucas could have left the house without getting caught for committing a double murder; instead, he keeps the baby alive and assumes Mr. Butler will know he took the baby to his classroom. (01:17:53)

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Stupidity: Addison got out of his car to drop his college application into a USPS curbside mailbox. A curbside mailbox is designed to be conveniently accessible from a vehicle (provided the vehicle is pulled up close enough to the curb). (00:02:50)

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Stupidity: Henry's plan was supposed to be perfectly timed, allowing his mother 45 minutes. It doesn't make sense to waste time - and increase the chances of being spotted - by having her go home to pick up the rifle when she could have simply kept it in her vehicle's trunk.

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