Well also that you can buy graham cracker crumbs, for making things like pie crusts. My friend gave me a weird look when we went shopping and I picked up whole crackers. And then the revelation that graham refers to a type of flour and is not in itself a brand. And Kelloggs sell the crumbs? Wild.

A biscuit base in the UK would usually require a pack of digestives and a rolling pin. I suppose some supermarket sells crumbled biscuits but...

As an aside, Golden Grahams used to be popular in the UK and I don't think anyone stopped to ask what the name meant.