[quote name='Trueno' timestamp='1493041507' post='3285094']
I don't know how these scrotes' minds work (or if they have minds at all) but I wonder if you make the outside of the shed too secure it might advertise that there's something in there worth nicking.
[/quote]
Six years ago I created the first of my Junkyard studios: http://basschat.co.uk/topic/149816-creating-my-own-rehearsal-space/page__hl__rehearsal%20space
The photo at post #2 (taken at the start of the project) shows how the garage looked from the outside. Basically, like a garage.
What you couldn't see was that the left-hand door actually fronted a solid wall, and the right-hand door concealed a steel barred gate like the cell door in a prison.
I'm firmly on the side of preventing the buggers from getting in, rather than somehow limiting the damage they do once they're inside. IMHO the best way to prevent someone from breaking in is (1) to give them no reason to bother to try (essentially camouflage), and (2) to present them with an 'oh sh*t' moment if they do try (like a completely unexpected steel gate), leading them to look for someone easier to rob elsewhere.
Attempting to damage the individuals concerned is a hugely attractive notion, but one that doesn't survive contact with reality.