Walter,
What is the difference between using an armed drone and a remotely detonated car bomb where there is a possibility of "collateral" damage?
...Because the Armed RPAS has the same CAS 9-line and delivery accuracy as an F-15E. 'Collateral' is not the sole home of RPAS. I might even say that the communication with multiple agencies, and the 'reach-back' immediately available to the RPAS Pilot is far superior that the fast jet mate...(and I have been both!), which reduces opportunities for CDE fails.