freebooter

noun

Etymology: From free + booty + -er. Calque of Dutch vrijbuiter (literally “free booty-er”), from vrij (“free”) + buit (“booty”) + -er (occupational suffix). Doublet of filibuster.

1. An adventurer who pillages, plunders, or thieves privately or for compensation; or wages ad-hoc war on other nations, similar to mercenary; also a "freeboot".

   “The military aspect should, however, be carefully studied, as the result may be to dispel the time-honoured connection between forest and freebooter under modern conditions with long-range rifles.”

2. One who rehosts online media without authorization, a form of intellectual property theft; one who freeboots.