Keep in mind that you want to keep the ticket agents work to a minimum. If you didn't list yourself, someone else has to do it for you. Because you can't go pass security without a boarding pass (a boarding pass request card, in your case), the ticket agent who already has a lot to do will have to list you. It's always better to have your friend/family who is an employee list you, at the same time, you will be told of your chance to get on your flight. Imagine if you're running late to the airport, and you have to get in line to have yourself listed….. All can be avoided if you are already listed.