Hi Alan
No doubt the convergent language in the forum is english, but the interpretation of things by the different members envolves rather diverse languages and cultures, which makes it a bot more complex.
Nevertheless i happen to have the 1969 edition of an Oxford Universal Dictionary first published in 1933. It says there that, a pirate is one who robs and plunders on the sea; a sea robber, etc.
In a Portuguese dictionary published in 2004, a pirate is one who atacks and robs ships; a corsair. But here i think the main preocupation of modern atributions to piracy are those that concern informatic and stuff like that.
However it is of common knowledge that piracy ( and privateering ), although implemented on the sea, often contextualy extended its action to land.
I guess that people atacking on an inland business basis, independently from their cause, would have another name
Fernando