No you don't, plus, you decide to go overboard and take a cheap shot to prove a rather obvious point. When you compare apples and oranges in the way you just did, it speaks a lot about who you are, really. Quite sad.
Lol @ "shame". Tauba tauba. Pfff
You and I both know that there's a way of doing things through the right channels; going all out against an individual on a public Internet forum knowing you'll have the support of a lot of like-minded people to keep you afloat, isn't really what it's about. It's super lame to be honest. Just because you happen to have gained some "success" over some lame number-plate sporting random guy in some random small town in Pakistan, it doesn't give you the right to take matters into your own hands over a complete and total non-threatening situation. Sitting in a boring old grey American suburb getting all feisty on the internet over some guy who sticks up something on his windshield about him loving boobies a million miles away says a lot about how your mind works, so spare me the bull, please. Try going ape-sh*t on the millions of vehicles with questionable material plastered all over them all over the NYC area to start with...questionable material your immediate family could witness on a daily basis.
Seeing how you're concerned about basic morality out in public, it might be worth your while campaigning and pumping-in a couple thousand dollars every year for better traffic discipline, respect for pedestrians, against jaywalking, wrong-side driving, an integrated traffic light system etc. The lack of the aforementioned kills people, not stupid bumper stickers (not that I am in any way condoning the guy's attention-seeking manoeuvre).