Why do you care?
I think it is incredibly rude to ask someone to give his name, given the situation in the Church and the world today.
People are fathers, mothers, single people etc. all trying to work and support families, their chapels, and maybe elderly parents in a non-Catholic world. Not everyone fortunate enough to have the luxury of being so careless with their name. A simple Google search by an employer or a vindictive person can ruin a life.