Currently, a lack of being able to type quickly on a keyboard does make things difficult. I make most of my bread and butter from npc traders tbh.
With that being said, on a cmdr I would make a demand of around 10 to possibly 15t out of 100. If he does not answer or runs, I will open fire and let loose hatch breaker limpets. As soon as I see cargo, I am scooping it. If he complies I am scooping it. No interest in blowing up cmdr ships needlessly. With that being said, there are griefers out there that shoot regardless and enjoy the notoriety, and I honestly do not want to be associated with that. I do my best to follow piracy as it is described in the elite wiki.
In all honesty it's a lot of risk to take. It does not matter if I murder or not, I get the same death sentence from bounty hunters. Comes with the territory, but I am okay with that. It's just simply too boring for me to just trade, or fly around shooting anything that says 'wanted' on it. Pirating even npc trade ships is a lot more engaging and takes some effort rather than fly to point A or B, or point at this and pull the trigger.
Don't know if this gives some insight on piracy as I do it or not, but I hope so.