@Daniel son STL
I applaud your faith in humanity, and your lack of attachment to material goods. Very Zen or Taoist of you.
I live in a crappy neighborhood. I keep all my trees in my back yard, with only an easy to see through cyclone fence surrounding the yard. So if you look, you can see my trees. The fence is 6 foot, but cyclone fences are easy to climb, and there is no lock on the side yard gate.
When I say crappy, I mean crappy, I have a retail drug house next door to the north, 24 units of subsidized housing to the west, across the alley, with a full view into the back yard.
Strangely, I have had no tree theft. Did find 2 "little kids" maybe 7 & 10 years old, trying to lift one of my largest trees. They were not strong enough. Chewed them out and they left. Over all, in 30 years, my mediocre collection has never attracted thieves.
Because of the neighborhood. Nobody from the local bonsai society comes over.
Oddly, my friend who lives in a "good neighborhood" and frequently hosts gatherings of members of the bonsai club, has been written up in the newspaper as a local bonsai artist, they have had several major thefts over roughly the same 30 year period. Thieves each time targeted some of the best trees.
If you are going to have theft, it is not the unknown, stranger, druggies or whatever. Most likely it will be someone that you invited into your home specifically to see your bonsai. My friend who was ripped off a number of years ago, had the theft happen about 2 weeks after an "open house" for bonsai friends.
So I would not be so worried about the "druggies" and "poor people" who see your bonsai. I got that every day. They don't care. It is the person who is into bonsai, and covets your trees that will be the problem.
My last dog died of old age about 10 years ago. It is probably time to get a new dog, but mainly for companionship, not guard duty.