average???
Uh, why is the average flight time and average range of "over 200 commercial drones" meaningful when determining whether a terrorist-piloted drone is a dangerous prospect? 200 commercial models is a very good sample size, great that they found out the parameters of all those models. But then they should look at the drones with the highest values of flight time and range and load, and determine which (if any) of them could be used in a terrorist attack.
The average isn't even relevant if one assumes a terrorist will just go out and buy a random one, since they might pick a model appropriate for their needs...
Biting the hand that feeds IT
