Bunch of wowsers.
What's the harm in asking nicely for a bit of a flash of flesh?
I can see that they may be upset about the potential risk of old mate letting that sign go and it going straight into the intake, but getting all shirty about the actual message and it's intention is just downright un-Aussie.
If you ask me, it should be compulsory for all women under 40 years of age and 180lbs to flash at ALL passing military craft, be they airborne or otherwise.....after all, it is what these boys are putting their lives on the line to defend;)