I am split down the middle regarding this. With the exception of a nick nack shelf, I figure everything in the public spaces of my kitchen and living room are fair game. But touch what's in my bathroom (whether it's in view or not) or that shelf in the living room and I will get very upset. My nick nacks are meaningful and many of them have spiritual significance. It bothers me when people handle this stuff. I do worry the belongings will be contaminated.