Elmofongo: 'sigh' You say piracy is not stealing others says it is, I do not know who to believe anymore :(
Dude, check any legal definition. Theft, stealing, etc. all have very specific meanings, legally, because specific meanings are crucial to a functioning legal system. In every legal system that bothers with copyright in a more than cursory manner violation of copyright is always a separate offense and often not even criminal (though that's slowly been changing, more and more criminal charges are existing for copyright infringement, every year).
F1ach: Its theft, if you go into a pub and buy a pint of beer and then decide to share it with your mate, the beer doesnt magically clone itself into two beers, the pub has sold one pint and one pint has been consumed.
And now you see the twisted logic that is required to make copyright infringement into "theft". Usually the arguments defy all laws of physics and the bounds of a reasonable allegory (by way of having nothing at all to fucking do with anything). Not to mention they have fuck all to do with any legal definitions, which actually do matter. All this shit is meant to do is convince you it's "wrong/immoral". Since, in this regard, copyright infringement falls in with the likes of murder, "being gay", speaking ill of the church, etc. (i.e. both things that most folks would find reasonably immoral and things most folks at a given time might find actually patently ridiculous) you'll have to try and come to your own, reasoned conclusions with regards to the morality of the matter.
However, make no mistake, there is no argument about copyright infringement being in any way "theft", people saying that are either lying to you or terribly unqualified to open their mouths on the subject.