Happy to explain. Due to previous attacks people and law enforcement around air travel are more on edge about such threats. This is because for inherent technical reasons during a flight a relatively small explosive can have devastating consequences. This is due to the pressure difference between the cabin and the atmosphere at cruise altitude , and the inherent energies incorporated in an airliner. (Both potential energy due to altitude, kinetic energy due to speed and chemical energy in the fuel.)

> are you implying its okay to do if the target is a rural farmhouse, but not an airport?

I'm not implying that. I simply did not claim anything about threats agains rural farmhouses.

> in a private message to friends? it most definitely is.

It seems we disagree on this point then.