A number of years in the military allows me to have an opinion on this matter.
When was the last time a U2 landed at Willy?
You can't for a minute seriously suggest that any activities especially secret military operations at Williamtown should preclude the use of this airspace for others.
Perhaps I should retract my "pffft" statement and I apologize for that.
Aussie Bob, I hear you but a number of others will disagree :-)