I know. Sadly it has become an accepted word in the public..
From Free Software, Free Society: Selected Essays of Richard M. Stallman, page 194:
" Publishers often refer to prohibited copying as “piracy.” In this way, they imply that illegal copying is ethically equivalent to attacking sships on the high seas, kidnaping and murdering the people on them. If you don’t believe that illegal copying is just like kidnaping and murder, you might prefer not to use the word “piracy” to describe it. Neutral terms such as “prohibited copying” or “unauthorized copying” are available for use instead. Some of us might even prefer to use a positive term such as “sharing information with your neighbor.” "
When I was a young boy, the word "gay" meant happy or brightly coloured. When I was at high-school it meant homosexual. When my kids use the word, they usually mean "sad and pathetic". English is a living language. If you want words that never change in meaning perhaps you should learn Latin.