a few more questions about chapter 108 and then I'll shut up. ^_^

Why was it oh so horribly wrong for Ed to use the Philosopher's Stone but perfectly acceptable for Roy to use one? Not one word has ever been said about Roy using one. Not one soul has ever complained. They're both good guys so why was it such a huge huge deal for Ed to use one but not for Roy? Roy knows just as well as Ed does what goes into a Philosopher's Stone and yet he used it anyway and no one cared. Why didn't anybody get pissed off about that? Why is Roy held to a lesser/different set of standards/values?