Anecdotial Evidence at best...
Forgive me for NOT taking this "report" too seriously.
....
Pilots and engineers have identified 75 incidents which may be linked to signal interference from passengers....OK. I have had numerous "unexplained" electrically manifested incidents, from autopilots disengaging uncommanded, circut breakers tripping, ect. Any many of these ended up signed off as, "system bit test Ok", or "could not duplicate, checks OK". Nary a passenger ( ALL Cargo ), and YES, checked no-one ( Crew ) had inadvertantly left anything on. If I were to throw in a few passengers, Shizzam, now that explains what happened, someone must have left their IPad on!!!!!
As I understand it, every incident in the past in which an specific device was identified, the "offending device" was bought ( from the passenger ), and then tested in controlled conditions. Never able to duplicate said incident. So, can you see why the "MAY be linked" in the referenced article is only about as convincing as the typical scare-mongering liberal media usually is.