I am *NOT* advocating that we allow cell phones or pagers to
be turned on during any part of any flight – however, does anyone
know of any documented avionics (flight radio and navigation)
problems caused by personal transmitters in the cabin?
Anbody know how "Myth Busters" debunked
this without themselves violating some
airline’s policies?

By the way, general aviation pilots routinely
carry cell phones AND USE THEM from
the air. Granted, their avionics is usually
pretty unsophisticated compared to
commercial airlines.

The only avionics that I know of that would
care would be ADF’s (which get directional
information from any modulated signal).

NOBODY uses ADFs any more. It would
be like trying to use a sextant for
positional information on the ocean.
If you were using it, you’d be trying to
prove something to somebody – not for
the accuracy of its information.