Not for online, for physical purchases. Another fundamental/SHOCKING difference between Europe vs USA is that when you pay with your card in a restaurant in Europe, the waiter brings the POS over to you, while in the USA the waiter disappears with everyone's cards for 5mins ;)

Not good security is it? They can take their time to scan/photograph the cards etc, while in Europe the card's details are for seconds and right in front of you.