If you're concerned about someone else picking up your luggage at an airport, there are a few things you could do about it. A lot of people put stickers or ribbons on their suitcases. Others will choose an unusual design from the store, and hope nobody else has the same one.
Some people are just extra, though, like this guy. He's got his own face printed on the side of his luggage, and he'll never have to second guess whether he's picking up the right case for the rest of his life.