Most traders are just scum, honestly.
Probably at least half the traders I encounter when pirating die because they don't stop or respond in any way, and if they do 7/10 it's piss-poor "wat u want" RP.
Such is the life of a pirate. But every now and then you'll get a good, rewarding encounter that makes it worth it. Besides, blueing dumb traders is pretty fun too.