Gravelbelly - no, I don't think life's like 24
Herc asked for the how's and I provided hypotheticals. Yes, there are other considerations, but "back door" is a generally-known public term which painted the appropriate picture. The actual method of opening said orifice will vary, and nobody suggested that sending the word "Rosebud" to the jet will shut it down. APIs were something akin to what I am talking about, and perfectly reasonable as an access method for your "God-mode".
As to whether I think such a thing exists, probably not, but I didn't suggest otherwise in my previous post, did I? Perhaps try reading a post for what it is (a hypothetical response to a hypothetical question) instead of wading in with your "I'm so well informed" size 9's and trying to out-gabble everyone present