I like the fact that this was included in the article linked on page 98, post 3910 by FLAPHappy:
A collision with even a lightweight drone could result in serious and expensive problems. A small drone impacting an engine would be unlikely to cause a crash, but it could easily cause the failure of that engine and millions of dollars of damage. Windscreens and other components are vulnerable as well. Small drones are invisible to air traffic control and onboard radar.
That is what Franklin and I said multiple times and were told we didn't know what we was talking about. Guess we did know what we were talking about since it's now been put in print by an unrelated source