Bermuda Triangle. fully believed that no planes or ships went there, and was convinced it was some supernatural area where people disappeared if they entered. Reckon I was about 15 when I realized it was bullshit.
Ant poison. For some reason there was a tub of it left by our predecessors when we moved in. White powder stuff. Every time my mum made anything with flour in I was scared that she might use the wrong bag by mistake, as if everyone just has tons of ant poison lying around the kitchen by the food.
Haven’t set a poll up for this one. Realise that it’s a me thing