It's not really up to me to say if its fair, it's up to the people of San Diego. I definitely spent a lot more money in town (on vacation) than I would if I lived there full time. That said, I'm guessing most would say it's not fair.

My point though is that this kind of things happens all of the time because there isn't a clean process to handle these situations. The concept of a virtual country could actually help fix this by establishing channels to compensate communities for services used by roaming visitors.