[shitload of citations needed]
Anyways, stealing is not necessarily defined by depriving one person of an experience or possession, it's defined by obtaining said item without giving the original author or owner the compensation requested for your copy. Sure, if you pirate a movie no one is going to be denied the ability to rightfully buy that movie, but the studio who released the film will have a miniscule amount of nearly untraceable shrink in their revenue stream. It's hardly worthy of a trial IMO, but yes it is stealing, even if its no more detrimental than swiping a magnet from a souvenir shop.