re. Putting range rings/abeams to show fir boundary, at best this is only minor help since many ATC freq changes aren't at an FIR.
Lonewolf, calm down dear; that comment didn't seem a slight, veiled or otherwise. It's a fact that if you put a heavily armed supersonic warplane close to an airliner which isn't expecting it, there's scope for things to go wrong, however professionally it's operated.