Yes that’s the specific reason they give. They’re fascists though, ultimately they just like finding excuses to throw away mail, so you don’t give them any.

This is what I was also going to advise! Pick a couple of styles to emulate for a purpose and use them. In my 20s I picked up block print so I could write to my buddies in the armed forces without the censors throwing my stuff away. It also comes in handy for whiteboarding at work. If you are into game design, maybe pick a style from one of the D&D dungeon illustrations and it might come in handy for your purposes?

keep a rag bag handy and just wipe up cooking grease with those, them throw them in a pile next to the wood stove

you end up needing the oily rags to wipe down the wood stove anyway or else it will rust