Brenda was extremely naïve

[TMC]

In Season 1, she let that girl named Tiffany get her caught up in shoplifting. Not only did Brenda take the blame with Tiffany, but Tiffany also put some of the clothes that she stole in Brenda's closet. Then Brenda's mother was the one to find the clothes instead of Brenda. How did Brenda not see that there were extra clothes in her closet?

In the Season 1 finale and Season 2 opening episode, she thinks that she got pregnant by Dylan and decides to take a pregnancy test. Why would she take the pregnancy test at her home? It made no sense for her to throw the pregnancy test in the garbage when she knew her mom liked to recycle trash.

Then in Season 2, she goes off to Mexico with Dylan but the people in Mexico think that she is lying about being a US citizen, so she has to stay there until her dad can come get her some ID. Who in the world goes out of the country without any form of identification?

Then in Season 4, she decided that she was going to marry Stuart despite knowing him for two weeks. She also decided to hide that she was going to marry him in Las Vegas from her parents, yet she told Brandon. She knew good and well that Brandon was going to tell their parents