I wouldnt phrase it that way. But it is very badly designed that the voice command purchasing is enabled by default, and should be changed that when set up it has to be explicitly activated.
Hell, it should also pay its customers for the hassle of finding themselves drafted into being beta testers.
Last night my wife and I spent about half an hour talking and SIRI activated twice--neither of us said anything to her and she doesn't even understand my wife's accented English very well. Casual voice recognition simply isn't up to the reliability to do automatic orders yet.