ATC Watcher, the French do carry out practice intercepts, I heard one in Brest airspace only about a week ago. The commercial jet being intercepted was told that it was a practice and the exact time it was going to happen. His flight had been "selected" by the French for no particular reason and he had no right of refusal.
I suggest you look again at the ICAO interception procedures and read NOTAMS.
Not really a useful suggestion!
