So it's not enough that you get a warning, but you want the other guy to do all your work as well?
Consider the check 6 a bonus, expecting anything else is pure greed.
Maybe someone can just change the recording to:
"Dear Sir or Madam,
Maybe you've already noticed but, if not, due to your lack of situational awareness there is a con on your six. By con I mean an enemy aircraft. By six I mean in your rear hemisphere defined as being behind a plane extending indefinately from wingtip to wingtip and out to the horizon in both directions, into the air and down to the ground. This is commonly referred to as the 3-9 line. This con is, if not already within, then very close to guns range. Guns range typically begins at 1000 yards although I may be giving you an early warning if your lucky. Do not check your own six. I repeat, do not check your own six. I've already done this for you thus this message. If you do decide to check your own six it might be too late and said con may already be firing at you, or already have shot you down. If you don't take evasive manouvers immediately said con will likely send you to the tower if he hasn't already.
Have a nice day"