It depends which country your servers are in. If it's China, then chances are the authorities wont care, if it's Russia, they might care, as they're seeking trade agreements with the US, and piracy is something that is a barrier for that. If they're in the US, then chances are the FBI will raid your server and you'd be in some trouble.
Nonetheless, it's ripping people's work off.
Think of it this way,
You spend about 4 or 5 months painting a few artworks, and you sell them for $500 each. Imagine your artwork being available for download, and people just being able to print them off with a high tech printer which is nearly identical to the original artworks, and as a result your sales are affected. Would you like that?
Mini