I noticed there was a bike that was always locked outside our building for a different reason -- it's hard to get a spot and people just store their bikes there instead of taking them home. I didn't do anything about it, but then I found out it belonged to one of the grad students I worked with. He got to work earlier and left later than I did, which is behavior I approve of.

Someone once left a note on my bike offering to buy parts and it freaked me out. That was when I switched to riding crummy bikes to work. That bike deserved better anyway