rsbob 

I never lock my bike, never. I take it with me into the bank, the optometrist, the dentist, the convenience store BUT I always ask first if it is permissible. If a store owner says NO, I thank them and go to another that does. My bike lives in a locked garage. When I didn’t have a garage, it lived in the house. If I am riding with someone, one of us stays with the bikes while the other goes in and vice versa. I will even carry my bike up two flights of stairs or put it in the elevator to take it with me. Never had anyone complain.

One guy asked me how much my bike cost and when I told them, they said the would do the same thing. Yes more booger flinging since I didn’t directly answer your question, but that is my solution to bike theft.