Is an airplane, hackable. Yes. It is.

Is it possible based on hacking over WIFI, USB ports and all the garbage that one puts out on the internet, no, it isn't.

Unless you know a TON about onboard electronics, there's no way. And even if you have access to the onboard electronics, (which you don't), you'd still REALLY have to know what you're doing.

Not posting anything more about this. But this thread caught my attention

And no, I don't know how. I just know a friend who works for one of the aircraft manufacturers.