Never. For one, games and movies etc are a luxury not a privilege so you can never say "I need it." Second, it isn't theft but a violation of copyright, punishable by at least $700 per work infringed and at maximum tens of thousands of dollars. Also, fun fact: peer-to-peer distribution would qualify as a continuing criminal conspiracy under the RICO laws, meaning you could even be imprisoned. Not that companies evoke them in lawsuits, it's a headache they don't want. But suffice it to say, it is absolutely illegal and as the products in question are luxuries and not necessities, there is no logical justification.