Some strongly feel it's not only not stealing, but what we all should be doing.
I'm somewhere in the middle. If it's open, it's open. It's not stealing. Did someone just forget to secure it? Maybe, but that's not something I should have to verify. The fact it's open means it's open, sorry. On the other hand, this Open Wireless movement I think is crazy. I secure my WiFi at least partly because I don't want to pay for someone else's bandwidth.