Obviously, the magnitude of our decent in piratehood varies from person to person, and at some level (murder being obviously a issue) we stop accepting them post-haste.
I find a close analogy to doing drugs and drug dealers in modern society. A lot of upstanding citizens enjoy doing drugs and actually like and feel safe around their drug dealers, but rarely if ever does popular culture show that side of reality.
I don't think its any coincidence that TV and movies show the murderous and thieving side of piracy as to condition us to be appalled by them, in general.