Common Courtesy and Following the Rules

I don't want to come across as a legalist, but does anyone else get tired of people who seem to think that they're exempt from following rules they find inconvenient and then get indignant when you call them on it? You know who I mean:

• People who smoke in non-smoking restaurants
• Single drivers who drive in the car pool lane during commute time
• People who don't shut off their cell phones after they're asked nicely by flight attendants
• Individuals who cut to the front of the line rather than waiting patiently like everyone else
• People who walk on "ground under repair"
• Drivers who take up more than one parking spot when parking is a premium (e.g., at malls during the holidays)
• Pet owners who take their dogs to pet-free beaches
• People on planes who place both of their carry-ons in the bins above, raising the probability that someone behind them won't have room for their bags

I'm sure you can come up with more examples, and again, I don't want to sound like a legalist, but doesn't common courtesy count for anything? I'd like to think so.