We already have legal terms for information that is property, namely intellectual property, the theft of which is routinely prosecuted (regardless of ideological beliefs on the nature of information).
It isn't exactly stealing. It deprives of potential money, but it doesn't deprive them of the good. It's copyright infringement, which is a form of cheating, and megacorps routinely cheat in other ways, like doing their taxes so they record a loss and paying little or no income taxes. http://theconversation.com/is-downloading-really-stealing-th...
Calling it stealing is at least imprecise. I think it's also inaccurate.