You shouldn't use a debit card for everyday purchases. Use a credit card since it offers you far more protection against erroneous and fraudulent charges.
While true, outside of the US credit card usage is not as common. Many of my friends don't use them, I barely ever use them. The only time I ever really think about it is to get bonus points for airlines.
Yes, I'm aware, but the person I responded to is very obviously from the U.S. or Canada.