topbunk :since when does military need permission of the intercepted a/c ? you obviously were asleep when they had the airlaw courses .
If indeed,as you profile says you are an A320 ATPL, I suggest you look again at the ICAO interception procedures and read NOTAMS.. RTF is only one of a the long list of reasons why an a/c can be intercepted.
I do not think there is such thing as practice interceptions nowadays , cost too much money, and good reasons for plenty of real ones around anyway.
Bonne annee !