The suggestion has been made countless times that manufacturers who customize their devices' builds of Android (that is to say, nearly all of them) should have the decency to offer users the option of reverting to a completely clean, stock version of the platform if they so choose. The concept came up at a press lunch featuring Google CEO Eric Schmidt last week, and the dude came up with an interesting explanation for why they don't require that of their partners: "if we were to put those type of restrictions on an open source product, we'd be violating the principle of open source." Of course, "the principle of open source" is open to wild differences in interpretation, the source of well over 20 years wort