Airfield Thefts
There was recently a major theft of up to date radio gear from a private airfield in the UK. Although not against 'enthusiasts' visiting airfields it is very easy for 'undesirables' to also visit under the guise of being an enthusiast. Also various spotter mags and sites give a very good account of what machines are where, therefore making it even easier to be targeted.
I think it is unlikely that a company that 'garages' vintage and classic cars would allow you anywhere near their charges, so why should aircraft be so 'available' on private land.
Regrettably I feel that the less information is out there the better; as there is little benefit in 'advertising' your easily robbed machine. For the same reasons marina's are now like mini fortress's which is a shame but not unexpected.