This is kinda stupid. It is much safer to be cynical about strangers. Also, asking a stranger to "watch over your stuff" is unfair. You are burdening him with

This is kinda stupid. It is much safer to be cynical about strangers. Also, asking a stranger to "watch over your stuff" is unfair. You are burdening him with the responsibility of your stuff while their is nothing in return for him. Everyone always acts out of self interest.