CurbTxt allows you to send an SMS to people blocking your driveway.(blogs.sfweekly.com)

    I think you have something here but it still seems a bit cart before the horse. The presumption is that we all want to be excellent to each other. In my experience when people are being rude it's more often a conscious choice rather than an inadvertent mistake. Granted, I don't live in an area where residents have to battle or shuffle around for parking and neighbors will be "neighborly" and register. However, during events with large numbers of people from outside the neighborhood, we often see rude behavior. In these cases there is no opportunity alert the offender of their "mistake". We either must be proactive to guard our parking or start a a tow truck parade to coincide with the event.