Your parents might have been annoying as they constantly espoused their beliefs about the negative impact of movies and TV shows on children, but that doesn't mean they were wrong. Even Disney movies set bad examples - for example, Tangled is full of terrible lessons about how young girls should calculate their self-worth - but Disney is not the only source of negative ideals. There are a lot of horrible lessons from kids' movies and shows that were promoted and encouraged over the years.
On top of that, there are probably quite a few plain old bad habits picked up from TV shows you shouldn't have been watching as a kid. Sometimes, the lessons are so positively portrayed that you don't even notice how problematic they are for years afterward. Here are a number of movies and shows everyone was watching as kids that put certain characters on a heroic pedestal even if they had some seriously problematic traits. Vote up the worst lessons you learned from watching movies and television as a kid, then go unlearn those habits!
In 1993 and for years afterward, young boys everywhere cheered Squints on as he was able to trick a girl into a position in which he could forcibly kiss her against her will in The Sandlot. American adolescents were awed and buoyed by his cajones. But that really shouldn't have been the takeaway because there's actually a term for what Squints did to Wendy Peffercorn: sexual assault. Oh, it's just a cantankerous kid engaging in some harmless shenanigans, right? Wrong. It really is the definition of assault, something that any parent would want to harshly dissuade their child from engaging in. Well, most parents.
There are actually a number of things about The Goonies that make the beloved '80s adventure not remotely suitable for kids, like the name One-Eyed Willy; and the degrading, fat-shaming Truffle Shuffle; and Mouth giving the Latina housekeeper instructions on drug handling. Mouth was the cool kid, but he was also a terrible influence on young viewers. He had a couple questionable interactions with the housekeeper, in fact, another one being him warning her about the "sexual torture devices" in the attic. He also taunted Chunk, telling him he had pictures of his mom in the bath. Mouth actually set quite a bad example, but is still hailed as a hero to this day.
Cher and Dionne from 1995's Clueless might not mark the actual birthplace of the "valley girl" accent, but they sure as hell perpetuated and disseminated its characteristic ineptitude of speech throughout virtually every middle and high school in the nation. It's the reason kids were inserting "like" after every third word spoken, which, for many, persisted years after. Thanks to these two spoiled, rich girls with almost no redeeming qualities, it suddenly became cool to speak like a moron. "As if!" you might dissent, but where did you get that hollow exclamation?
Bart is the consummate cool kid, a ratchet skateboarder capable of standing up to bullies and causing general mayhem. But the issue is that Bart is essentially the protagonist of The Simpsons (or at least shares center stage with Homer). He's not presented as an antagonist; he's the hero. So it stands to reason that kids will see his troublemaking, his blatant disregard for school and rules, as tenets of coolness. This NBC News story from 1997 is about a fourth grade teacher who held Bart Simpson up as a model for how not to behave, and presented him as a negative role model. But if that teacher's not there to do that, the natural alternative is for kids to just view him in a positive light.