I usually take my bike inside and nobody ever says anything.

Slightly off topic, I remember this one time when I worked at the grocery store about a block away from my house. I was getting some carts from the parking lot pretty late at night, and a kid, probably around 12 years old, comes riding up with a girl standing on his pegs. They get off the bike and leave it in the front unlocked and they're like "hey man, can you watch our bike for us?" I said sure, being a fellow cyclist and whatnot. Well, they come running out of the store a few minutes later with bags full of groceries and leap on to the bike and ride off, thanking me. I feel pretty good about watching their bike, until I walk back into the store a few minutes later and it turns out they stole all of their groceries.