I recall a nut set a midland 145 alight at GLA a few years back all be it only causing minor damage.
ABZ had a drunk climb a fence and go to sleep in the back of a king air a while back. Funny it may be but lets face it people break into and out of prisons nothings imposiible! All we can do is assist the security services by doing our bit and keeping our eyes open! I recall at MAN there was a pilot scheme to provide spotters with an emergency call box in the popular spotting areas. Strange I grant you but lets face it there is almost always someone there and I for one would welcome them calling airfield police to report irregularities.