Have you seen this before? It was a first for me. A bicycle locked up at the rack, with both the front and rear lights blinking away. Surely they noticed the lights blinking while they were locking it up? In a hurry maybe? Or a new super duper type of battery that lasts so long you don't have to turn the lights off?
Then I was wondering: should I turn them off? What if it wasn't the owner of the bike who turned them on, what if they are the "I leave my removable lights on my bike when I park it" type, and someone passing by thought it would be funny to turn them on, and were hanging out nearby to watch the reaction? I don't know.
I guess it's one more way a bicycle is better than a car, though: if you leave your car's lights on, it may not start at the end of the day. The bicycle motor, on the other hand, doesn't need a battery to get going. Just a hunk of dark chocolate, or a cup of strong coffee. Oh, and some excellent weekend bicycle riding ahead also helps. Get up. Go ride.