Best way to not get addicted is to never try it in the first place.  I can watch with glee as my relative wealth grows considerably, but it's short-lived, knowing full well if things get bad I get swept along with the tides.  So, no, no impact on me since my monthly transportation budget is usually the cost of 2 round trip bus fares to the airport.

But here in Denver, the public transit is pretty good, and foreclosures(and our economy) are pretty bad.  There are noticeably more RTD riders than usual -- and most of them poor and ethnically diverse.  This is a bit distorted as a measurement, though, because the percentage of people using our transit system was originally so small that even 1% of trips being rerouted has a dramatic impact on ridership.

An informal census of parking lots, stoplights, and the traffic at the airport doesn't countenance any obvious divergence from normal behavior whatsoever.  I'm convinced significant demand destruction is an impossibility until prices get dramatically higher than this.  Demand is still up marginally(~0.5%) YoY, indicating some population/wealth growth and some decreased demand per capita, but China, India, and supply constraints are doing juuuust fine to make up the difference.