Although I'm not surprised that electronic devices can interfere, I am
a little suprised they can interfere when the cockpit door is closed
and the devices are some distance (several rows), away.


Ah... the aviionics displays may be in the cockpit, and the computes may be
in an avionics bay behind or below the cockpit, but there is wiring all over
the airplane carrying data do and from sensors and antannae located
throughout the aircraft. Remember one case on the ASRS reports stating that
simply having a pax trade seats with the person next ot him solved an
issue... could likely be that a data line ran right below the first seat,
but not the second. In one scenario i think it was tracked down to a
specific brand of laptop, with a specific hard disk in it... nothing related
to wifi, or any other radio signals for that matter.

I am surprised tho at the number of idjuts that continue to use their
hellphones after they are told to turn them off, and yes I have seen people
use them in flight, and get quite vocal when told by an FA to turn it off.
Gotta love all the oblivious chattle out there that have to have everything
their way all of the time... the real world isn't Burger King folks......