Just read this thread and I am appalled at the thought of some idiot wanting to harm what is arguably the finest airworthy selection of vintage aircraft.
I grew up just down the road from Old Warden and like Oxenos I have now retired from a full lifetime of Military/civil flying as well as flying models since 1950s.
Why would anyone be offended if asked to produce their insurance when flying models and what sort of person deems it to have been a good day when all their models are either in bin bags or lost.
Sorry Doppleganger but Oxenos is absolutely right. You should either change your attitude or improve your building/flying skills or stay away.
Lets hope whoever is responsible for these anonymous notes is bought to book and Shuttleworth remains as it is now.