Despite the second stage being a mass dummy and completely unpowered I do not believe that is sufficient reason to say that contact between the stages would lead to anything but catastrophic abort. If the stages are close enough to contact, you would probably not want to light your second stage.
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Just wanted you guys to know, the SpaceX flight software group are laughing our asses off right now. Thanks.
Despite the second stage being a mass dummy and completely unpowered I do not believe that is sufficient reason to say that contact between the stages would lead to anything but catastrophic abort. If the stages are close enough to contact, you would probably not want to light your second stage.