If you're getting messages from accounts that have no trophies and ask you for your age

Something that needs to be addressed. Yes if you receive a message from an account that has absolutely no trophies at all and absolutely no games played at all, and they ask you for your age and your name, they are a bot/spam. They give you a link to click that has you enter your name and credit card information, obviously scamming you. Just as you do with spam in your email, delete the message, block them, and move on.