They start doing this, no one will buy them anymore.
Read more: http://www.thinq.co.uk/2011/1/21/sony-rumoured-be-adding-serial-keys-ps3/#ixzz1BgVHqTojRumour has it that Sony is looking to the PC games market to help solve its growing piracy problem on the PlayStation 3 - with the introduction of serial keys to its games.According to 'a very reliable source' quoted by PS3-Sense, Sony is attempting to address the recent revelation that it failed to properly secure the private signing key for its flagship console - leading to clever tinkerers producing third-party firmware that allows unofficial software and illegitimately downloaded games to run on unmodified hardware - by looking to the PC retail market for solutions.