That's a good point... I haven't thought about it too much, but it's certainly on my mind more. If I'm outside or nearby a coffee shop with free WiFi, I make a point to buy a coffee if I'm really only interested in the WiFi access. One nearby shop has a router with great coverage, so it's possible to stay outside or go to the park while still using their connection. I still order a large mocha for their generosity.

With local or residential WiFi, I'm definitely gray on the idea. I know when my own access points were unsecure, I had neighbors using my 30Mb/s fiber. Unsecure access points are definitely an "open invite" for anyone's access.

How polite are others with their N770 or N800's?