Tech people overestimate people’s ability to distinguish harmful versus harmless actions. To us it seems obvious that there’s read operations, write operarios, and execute operations, and that the read is basically safe, write can lay traps for you, and execute can kill your computer or the control you have over it.

But that’s not obvious to everyone. We just tell them “Don’t run any code or give it permission to overwrite anything” but most people don’t know what the significance of that is or how to notice when a button is going to cause a write or execute.