See, copyright violation has a well defined term, namely "copyright violation". Piracy means something completely different (an act of robbery or criminal violence at sea).

Despite negative connotations "hacking" still means expanding the usage of an object and "terrorism" still means enforcing ones ideals through violence.

So these comparisons are not valid.

EDIT: To make my point clear. When clicking the link, I thought the article was literally about pirates, that is sea criminals (or perhaps the political party). If only the author would have used the more descriptive, and more correct term "copyright infringement" I would have been less confused. So usage of the word "piracy" in this context is both damaging, wrong and confusing.