Stupidity: At the end of the movie when Laura discovers that all the cans are neat in her cabinet, she knows she has to leave the house. There's a back door to her house, but she runs up the hallway to the front of the house. She could've been out of the house in seconds going out of the back door, but of course that would've ruined the end of the movie.
Stupidity: Given Louise's character, it makes no sense at all for her to leave Thelma in charge of the money. She's known Thelma for years, and knows fully well how flaky Thelma is. And Louise is shown as a person who lives by "If you want something right, you've gotta do it yourself". She's responsible, perhaps even uptight, at that point in the movie. So it defies everything about her character that she would let Thelma guard the money - it smells like a device set up just to allow the money to be stolen.
Stupidity: The crack house workers are all topless to prevent 'hiding' any product for personal use. Yet are also wearing parachute type pants that they could easily hide things in.