It is the Leaders who are 100% to blame. No site should be left without making sure its better than we you came, all fees are paid and also its inspected according to site rules.
On ething I would say is if yu are going to name and shame in a public forum then please name the squadron otherwise you are tarring all ATC units with the same brush. Priot to scouting I was an Air Cadet and Civilian Radio intructor and am ashamed that this could hav ehappened. There is no excuse and aformal complaint should be made to Wing HQ. If you hav eany problems finding that out then PM the unit and scout site and I'll give you the information.
I am with Roger on this - on all points. Our Scout Leaders always check that everything is left as it was found (and on occasions better) and the "clearing up" element is intrinsic to the camp. I am sure it can be resolved with a simple letter.