Three days after I moved to Canada somebody stole my bicycle from Yorkdale. Nice introduction to the country.
Then I found out my best friend was breaking into my place while I was at school. I found about 20 of my cassette tapes sitting in the dirt on the floor of his car once & wondered how they'd gotten there.
I had a party once and another so called friend turned around and my brand new set of strings was sticking out of his back pocket. Another friend stole a diamond ring. Another one stole some rare 1967 Chum Charts I'd had since I was a kid.
I put cameras everywhere now and bug my phone... have a little red light that goes on whenever somebody is using a phone in my house. I've got video cameras all around the house recording 24/7 with a battery backup in case the power goes out.
It sucks to be paranoid and spy on people but you can't trust anybody, especially when you've got studio equipment.