If you see that somebody left their bicycle light on: switch it off An idea from Bart

I always (or almost always) do that... it's the smallest thing you can do, but i like it. The nicest thing: nobody will ever know, because nobody remembers that they forgot to switch it off.

I already do this sometimes. But once someone (apparently the owner of the bike) started shouting at me. He thought I was going to steal his bike :o