I don't even take my Garmin off the bike when I park it most of the times, I agree that a lock will only invite someone to think there is something valuable in there. Before I retired I was a route sales man for a major food item company, we were told to leave our trucks unlocked at night when they were at the depot. Because if someone wanted to see if there was anything in them they would break the window to get in the truck, but if the doors were unlocked they would be no damage.