None.
Of course. But I have been accustomed to always trying to protect expensive electronics from scratches or impact.
I carry a metal "tactical" pen in my shirt pocket. I find myself less apt to leave it somewhere than a regular pen. I am conscious of the risk of having it used on me.
I put trying to protect gear, even electronic gear, in second place to protecting my skin.
While I enjoy collecting a few 'tactical pens' (as widgets of the current age of 'tactical accessories for gentlemen'), I don't carry them on my person. I prefer stealth, given the opportunity, and prefer to avoid relying upon them and risk them becoming a crutch.
I did, as a very young man and newly minted martial arts practitioner, carry a short length of lightweight dowel with me upon occasion. Back then it was a lot harder to find Yawara for sale, as they weren't common outside of some limited training supply stores. The Kubotan was too narrow, and it could become slippery, even with the token grooves.
The use of a pencil or pen, in lieu of chopsticks, means learning to acclimate the grip and manipulative techniques to the average pencil or pen barrel. Not an easy skill to acquire (despite the ice pick application ala John Wick), especially when utilized with an art like one of the Mantis styles. They can start to become looked upon as self-torture training devices during the early times.
Yep, there's always a risk of anything we may have ending taken and available to be used upon us ... including guns and knives. Most especially guns, since those are something that are most easily grasped and are simple to use (unless something about the design is unknown to someone just grabbing it and attempting to use it).
Remember the old Bic Pen commercial on TV, where the Bic is fired from the barrel of a .30-30 at an oak board, and the tip (having penetrated the board) is used to write BIC on a sheet of paper? That was one of my favorite commercials in the 60's, and it always came to mind when I was carrying my Bic pens at school.
Nowadays I prefer my pens to have metal barrels.
I sometimes keep one of my sets of chopsticks available to let my fingers manipulate them while watching TV.