faulty wiring in the cockpit after the entertainment system started to overheat. electronic device don't start to do arc wiring with a portscan. Stop spreading bad info.
Even if in any other dimension it can be possible, it's the responsability of who design the system for protect against this.
Agree with the last line 100% - although the same argument can just as easily be applied to any and all systems in any and all arenas. The fact that the potential exists leaves a margin for error, and a window for trouble, which is what the post is about. If the potential for failure in a system is there, it needs to be addressed and the effects nullified or mitigated.
I agree it's not likely, but there can be some rare cascading scenarios. Like pilots may update electronic flight bag data via an onboard network which is separate from the entertainment network...but shares bandwidth with the same satellite transciever/antenna. Your port scan hogs the bandwidth somehow, resulting in somewhat less fresh data for tarmac conditions, etc. It's not likely, but it's possible.
You don't have to go any further than the Wikipedia article the previous commenter provided to see that no evidence has been provided for how sending packets to an IFE could take down a plane.