Given the driving prowess of the other motor drivers on the road, I don't feel guilty @ all. When I'm in my car, I'm always flanked by terrible drivers who are:
- inconsistent (who knows their next move - no signals)
- inattentive (can you say cell phone?)
- rude (cut me off, etc)
When on the bike, I am much more courteous and predictable than 75% of the drivers on the road. No, I don't feel bad in the least.