The exemptions always put the lie to all the safety flim flam.
Examples: An FSU would be advised by a club when gliders commenced and ceased operating, and also when (say) an individual glider from elsewhere was coming in.
Wow - so much safer being informed by an FSU that traffic includes multiple gliders operating at random levels on random tracks around e.g. the Dubbo AFIZ.
Appropriate response from pilots transiting the area? Keep a good lookout.
NOTAM of multiple gliders operating at random levels on random tracks, around Dubbo. Appropriate response from pilots transiting the area? Keep a good lookout.
There can be multiple gliders operating at random levels and random tracks out there any day any way. Appropriate response from pilots? Keep a good lookout.
FSU or not, expert CAGRO/UNICOM or not, mandatory radio carriage and use or not, there always was and always will be the risk of unknown traffic, and the appropriate way to deal with that risk will always be the same. The belief that gadgets and third parties can provide a completely reliable and complete traffic picture is blissful ignorance. Fortunately, the cumulative risks are so small in Australia that the bliss is rarely upset.