At 15 I was cutting lawns and had earnings statements for said business! Money was always tucked away in a lock box, I have change laying about thats it!
I am way to cheap and organized to have even a $1 un accounted for. Its the German in me I guess.
You really should teach them a lesson before they learn it the expensive way. I'd start taking any money laying around and sticking it into an envolope. Wait until they notice its gone and let them dangle for a little bit. Hopefully after you return it they will realize that they need to be a bit more carefull.
I used to leave my wallet around, now it always stays on my person for fear of my sister ripping me off. I learned not to be so trusting the hard way.
