Because I'm a filthy pirate. Incredibly, this means I want cargo, not blood, especially not my own blood.
So I use logic to choose my targets. I simply go for those that are obviously a cargo hauler.
Upon sight, I drop my "submit now" macro & begin the interdiction tether. Sometimes the target fights back, sometimes they follow my request.
We drop into normal space. I send my "stop for scan" macro. If the target runs or shoots, I drop a "last warning" macro. If grey stop, I continue the cargo scan. If they have cargo, I request at most six tonnes, as I only have a sixteen ton hold. Often I request less. If the target begins negotiations, I discuss terms. After the transaction, I offer protection for an extra ton of cargo, his choice of commodity. This protection means I won't attack him for a week. I have a notebook at hand.
If he does not comply, I open fire. First, I target a drive. Then, I target the hatch. If he tries to shoot, or calls in friends, I kill him. I have to get build a reputation.
Now I don't see the above as unreasonable. I make every effort to open diplomatic talks. What happens to the hauler is ultimately his choice.
Also, I welcome bounty hunters. I have a macro taunting them to chase me, and another saying "Well played" if they best me.
But, despite all the efforts to be an efficient pirate who just is after cargo, only killing as a last resort, I'm near always called a griefer. Oh well, if that's a term for a true pirate now, I'll wear it with pride. Watch out cargo movers... I'm on the hunt. :]