If used as such, yes. Personally I think the human brain is the greatest weapon. Throw one at someone and they usually won't want to mess with you.
You have to remember that these are not mindless, arbitrary rules, they are based on common sense. It goes back to "the man on the Clapham omnibus" principle of English law: The man on the Clapham omnibus - Wikipedia It is this way so that olympic fencers don't get arrested on their way to a competition, antique sword dealers don't get arrested on their way to work, but someone trying to get into a nightclub with a screwdriver or someone hanging around a street corner with a baseball bat do get arrested. EDIT: This is English law I am talking about, you would have to check the laws on carrying weapons in your country/state.
I'm considering a self defence sub-forum where we post a video of an altercation and one of us takes on the role of one of the parties involved. The idea is that you have to give a statement describing what you did and why. The idea is rather than quoting legal sites, or legal jargon you actually try and justify what you did. The rest of us can try and counter the arguments and what results should give a clearer indication of how your words or actions either escalated or dealt with the situation. It's a little like a de-brief on a scenario training day.
The plan is I would for example watch the confrontation and make a statement that started, "he looked threatening...". You would then say, "oh so you attacked my client because of the way he looked at you?" From this example you can see how my statement has already started to trip me up, even if I was ultimately in the right.
I've not read it yet, but this book was recommended by John Titchen. It was written y a karateka who is also a lawyer. https://www.amazon.co.uk/UK-Self-De...sonable+force&qid=1556560812&s=gateway&sr=8-1
If I stab you in the eye with the pencil. Yes. Would you say that if someone stabbed you in the eye, causing permanent damage, that you would simply ask the Police and Judge in the Court, that the other party be only charged with assault? And not assault with an offensive weapon, because it was a pencil? Its all about what you do with the thing!
Not proud of it but when I was in my teens at school I was jumped from behind and turned to lash out in defence whilst I happened to be holding a ball point pen - poor kid couldn't realise why his top lip was flapping about and his shirt covered in blood. Even though it was unintentional I never let on and it had the benefit of meaning people tended to look elsewhere for a scrap.
The brain is also everyone's worst vulnerability. In that sense, it's still a weapon I guess, to be used by one, two, zero, or more. Definitely a double-edged sword. Possibly triple. What would you do if someone threw a bigger brain at you? Would you flee in terror? I personally carry nothing for self defense, and not even my mind half the time.
Maybe a watch and a snack, so you don't go to kebab shops at 1am, and you'll avoid 76.876% of all the fights.
I used to years ago, but just got myself myself in trouble, where do you leave your mind half the time then?