Not a folk song - not even a song - but the part of Kipling's "Rhyme of the Three Captains," where the British merchant captain is complaining about the privateering activities of John Paul Jones, should qualify:

"He spoke of the Law as he crimped my crew—he swore it was only a loan;
"But when I would ask for my own again, he swore it was none of my own.
"He has taken my little parrakeets that nest beneath the Line,
"He has stripped my rails of the shaddock-frails and the green unripened pine;
"He has taken my bale of dammer and spice I won beyond the seas,
"He has taken my grinning heathen gods—and what should he want o' these?
"My foremast would not mend his boom, my deckhouse patch his boats;
"He has whittled the two, this Yank Yahoo, to peddle for shoe-peg oats.
"I could not fight for the failing light and a rough beam-sea beside,
"But I hulled him once for a clumsy crimp and twice because he lied.
"Had I had guns (as I had goods) to work my Christian harm,
"I had run him up from his quarter-deck to trade with his own yard-arm;
"I had nailed his ears to my capstan-head, and ripped them off with a saw,
"And soused them in the bilgewater, and served them to him raw;
"I had flung him blind in a rudderless boat to rot in the rocking dark,
"I had towed him aft of his own craft, a bait for his brother shark;
"I had lapped him round with cocoa husk, and drenched him with the oil,
"And lashed him fast to his own mast to blaze above my spoil;
"I had stripped his hide for my hammock-side, and tasselled his beard i' the mesh,
"And spitted his crew on the live bamboo that grows through the gangrened flesh;
"I had hove him down by the mangroves brown, where the mud-reef sucks and draws,
"Moored by the heel to his own keel to wait for the land-crab's claws!
"He is lazar within and lime without, ye can nose him far enow,
"For he carries the taint of a musky ship—the reek of the slaver's dhow!"

Peter.

PS - Sinsull, the 'revenge song' you asked about sounds a lot like Tom Russell's "The Sky Above, The Mud Below" - from which I quoted near the top of this thread, about 5 years ago (!). Although nobody gets scalped in that, just hung.

P.