Saying “what are you looking at?” to someone staring at you on the bus

Throwing your used gum in the garbage.

Leaving a tip for a waiter or waitress.

Eating food at the grocery store before buying it.

Walking on the sidewalk, not in the grass.

Cleaning up after your dog goes to the bathroom on someone's lawn.

Moving to the back of a crowded bus so there is room for people getting on.

Playing your music without headphones on the train.

Sneaking on the train without paying.