If you modify a stick into a shiv and stab someone, you won’t be arrested because you “modified an object that you own” – you’ll be arrested because your modified object was then used in a crime.

Not to stretch the metaphor too taught, but in this case the guy going to jail was the guy who runs the social media for a business that sharpen sticks for folks that don't know how to do it themselves, not the guy actually doing any stabbings.