It's not so much the crime of theft that bother's me. If I'm not in the house and my apartment is ransacked, whilst not ideal, is not really a problem.<p>My main concern is for the safety of my girlfriend and myself.<p>[EDIT] I just wanted to point out some of the security measures that I have in my home (In South Africa).<p>1) I live in a walled off (3m walls) estate with permanent patrolling guards.
2) The walls have an alarmed and electrified fence on top of them, (about 1m in addition to the 3m wall).
3) Entrance to the estate is controlled via a single guarded entrance. 
4) The entrance has camera's.
5) I live in a 3rd floor apartment with a balcony, the only way to the access the balcony is to climb two stories.)
6) The door to my apartment has a security gate.<p>That been said; my neighbor on the 3rd floor was robbed. A ninja, I presume, climbed to the third floor and stole his wallet and mobile phone.<p>His girlfriend woke up with the criminal standing in his bedroom, she screamed, he chased and the criminal jumped the 3 stories to the bottom floor and GOT AWAY!<p>After that incident I installed a security gate on my balcony.