...Insurers will hardly be pushing an unknown either.
james michael, I would of thought that all civvy UAVs will require insurance - e.g. theres no pilot on board to navigate between the houses after an engine failure (I understand there have been civvy UAV crashs already in the U.S.)
IMHO, UAV insurence will be a
big market for the aviation insurers.
As I said, I'm thinking ADS-B will be required for any expansion in UAV operations so I would expect the insurers will be pushing to get ADS-B in ASAP - the sooner to be
profiting from it all 
... of course, when the terrorist GPS guided Buzz Bombs turn up - no ADS-B.