Why don't you ask this question on the Military Forum, I'm sure that you may receive some more informed answers?
I my day QRA (or its equivalent) was entitled to Police all of its Nations Sovereign Airspace. There were set regulations and qualification requirements ie Combat Ready AD.
Civilian pilots should be pleased rather than scared, worried or distressed when being intercepted by a qualified pilot/crew.
Of course if you choose to blunder through VRF airspace and come close to a 2V2 Air Combat sortie then "see and avoid"!