People obviously don't appreciate the tactical aspect of this pen. Apart from the stealth technology of the camouflage. Since it is compatible with bottle ink in addition to equipped with a pointy stainless nib; one can possibly use it to bleed out your enemy within days. Also, people can mostly carry the pen around without legal concerns like carrying EDC knives. (Disclaimer : this is simply a sarcasm rather than to provide any feasible tactical advice)