That analogy still makes this sound like a textbook designation. In that situation the pen manufacturer is expected to sell pens without a theory of what will happen next. The person who buys a pen might use it to kill someone or commit horrific legal/moral crimes and that has nothing at all to do with the pen manufacturer.

I can see how I might reasonably refuse to deal with that pen manufacturer. The pen manufacturer is unreasonably pushy and they're going to be massive trouble to deal with because they're all up in my business in a paranoid way and disrupting my use of their product. Companies have made my never-again list for far smaller slights.