I grew up in a hoarder house and I'm pretty sure I ruined my life by teaching myself to do the dishes as a kid. I was expected to keep the place clean for the rest of my childhood, and that turned into me being the only one to do chores of any kind. I was actually guilt tripped into skipping college so I'd be available to drive my sister to classes.
So yeah forget all the drugs and murder and shit. The real worst thing a child can do is wash a dish.