I really really cant stand it. I don't look at peoples shoes/clothes/car/watch etc to determine what kind of person they are. I pay attention to how they behave. How they treat wait staff or talk to women. Someone littering in front of me is basically the end of the conversation. I don't need to learn anymore.

I will never forget sitting down at a restaurant and watching a new installer open his straw, roll up the paper and drop it on the table...then he wiped it right off onto the floor. 40 year old guy. The littering wasn't even a conscious action...it was like he was so used to it that he was on autopilot when he did it.

Another common thing i see is the jerks who collect soda bottles in their car and then they have their passenger just kick them all out in the parking lot. I have seen this a dozen times or more. There is a trash can at every gas pump in the world where you can throw away as many bottles as you want. You can even do it while your tank is filling up instead of standing there watching gas pump tv.