Not sure if it is a good thing, besides plain studying, though. Imagine some developer in perfect good faith who finds some interesting graphics code online with no references to EA and a fake Open Source license attached to it, and that code happens to be part of EA's code, then imagine this developer incorporating them into an Open Source game, maybe just 150 lines of code out of several tens of thousands. EA's lawyers would hardly ignore him, and the poor guy would see his own career and possibly his entire life ruined. Not to mention the possibility of becoming a case against Open Source.