It's not online and anyway I'd completely out myself
but it was about how this head mistress of a very old school Montessori setting came across the book We Don't Play With Guns Here, which argues that playing with pretend weapons is a natural part of children's development. The idea that guns etc. are just bad arose with the anti-war movement in the 1960s and the author researched how most UK preschool settings had just accepted as fact that gun play equals glamorising violence and violent kids.
So the woman I interviewed said they thought nothing of girls using a stick to pretend paint their nails, but went crinkle lipped if boys used the same stick to "shoot" someone. They'd think the first is cute and the second bad, even though they'd both be using the same stick and exploring their identities in a natural way.
After that they changed their policy and decided to allow gun/weapon/superhero play and use it as a platform for talking to the kids about their fantasy worlds. They ended up exploring knights and dragons, star wars, pirates, Romans, etc. and had amazing games, chats and art sessions as a result. She felt that allowing kids - esp. boys - to explore these games with adult interaction was good for their development and esp. male identities - the key is adults observing, engaging with and guiding their play.
I was initially completely against guns etc but changed my mind because my DTs had so much fun with swords, pistols, light sabres etc. It's never been a problem for us and they are peaceful, well behaved kids. So it's not about the toy itself for me, but how kids play with it.