I dont have any Adelaide charts handy but how easy is it to get close to a class C approach path in a Hang glider down there???
Dont reckon the ATSB will ever find him......not like he would have had a BIG VH rego to spot, or a radar trace to where he came from.
If it was that close it shoulda scared the crap out of the idiot! And he might not do it again.
J