Luggage locks are not at all useless. Many people can’t be trustworthy. You can’t be sure of their intentions. People who travel from one place to another usually sleep in hostels. Placing the luggage in an anti-theft room will cost you more money. It is wiser to invest in a lock for your baggage than to pay additional costs when you are traveling places. It is more expensive to spend money on luggage holding than to invest in a lock, from the beginning.