Whoever mentioned the commercial interests? It is simply about whether one sees such sharing (evading paying) as stealing or not.

I believe the reasons for explaining (though not necessarily condoning) why people may be motivated to take for free rather than pay for a totally non-scarce and easily replicable intellectual product is very important. I think discussions of business ethics (however oxymoronic people may think that concept is) in dealing fairly with customers is every bit as important as simple discussions of legality.

As in most things there are no black and whites

I must be honest with you: You do not come off in most relevant topics on this board as truly believing there are any shades of gray whatsoever in the arguments.