A young guy just walked into our office. I initially thought he was selling someone, but that turned out to be wrong. The guy said that he was using our open WiFi, and asked if we minded. We looked at each other, shrugged, said no, as long as he didn't use too much bandwidth and didn't do bad things like sending spam (we pay a flat rate, and use ssh/ssl for everything).
Then the guy asked for some technical help -- in particular, he asked for an outgoing SMTP server that he could use. He mentioned that he lives in a building across the courtyard and that the connection was a bit weak, and did we mind if he set up a repeater in his flat?
It turned out he was a designer, studying cinematography.
It was a little bit weird.