If you want to justify it look at it this way. The companies you're stealing from work really hard to separate you from your money and won't hesitate an instant to do whatever will positively effect the bottom line*. You, as a consumer, are entitled to use any means at your disposal to stretch your dollars as far as possible. That includes illegal methods. Just don't get caught.
* Caveat is independent game companies. But even most of those are just looking for a payday anyway.
This is the point of any business, to make money. Might as will steal from any business.