Why traders don't pay?

[The Savage]

What is this now? Noob pirate guide? Don't we have a section for tutorials?

It's a reply to:

Well yes, nobody told that the trader can't run. But if you run away, or try to , that means you accept the consequences.

My un-edited post was me stating about that halting vessel is not a demand, but then I found it out a slight change in rules I've been not aware of, even though I've been pirating for 4 years. I still remember that a few players got sanctioned for "not dropping a demand", after they destroyed a vessel which failed to stop after multiple warnings.

Edit:
@jammi
Thanks for explanation, because I've I stated above: I know there are some players which got sanctioned for killing a vessel that refused to stop. That's why I poked up that concern.