Liquor can legally be brought into businesses that only have a beer and wine license. There are even some that encourage customers to BYOL (there is a restaurant that will sell setups for margaritas but customers must bring their own tequilla). Ice houses and other bars also permit outside liquor.
I've even seen a restaurant that has no alcohol permit and allows customers to bring their own beer or wine.
Ever see a restaurant allow a group to bring in their own birthday/anniversary cake?
A lost candy bar sale affects the theater owner's bottom line because all of his money comes from the concession stand.
Money spent on bootleg DVD sales affects the studios directly (since they get the ticket revenue and rank against one another in a p!ssing contest based on ticket sales each week).
How much does a bootleg viewing audience affect a theater owner's concession sales? Do the viewers stop going to theaters altogther, or do they spend their money on another movie instead?
Ah, the old "I'd never buy your product anyway so therefore it's not really theft" rationalization, right next to the one which says "everyone does it and therefore it's okay that *I* do it."
Why not also ask who's always being harmed by running a stop sign? Or a stop light? Or speeding? Or drunk-driving? Bank-robbers claim no one is harmed by them, either, and hey, banks are a group of private companies who ought to be privately searching for those who rob them of their own money, eh?