What is your personal etiquette for when it is and is not ok to ask to look through other people's change? Do you ask to look at the bank teller's coin tray? Do you look at your own change carefully, causing the store clerk to think you are second guessing their counting ability? When you are with friends, do you ask to look at their change before you spend it? How about the take a penny, leave a penny tray? What about picking up change on the ground? There are endless opportunities for finding silver and rare coins, so where do you draw the line between what is rude and what is quirky?