FoTL believe that everyone is a real person and a legal ‘straw man’ at the same time. The straw man is a legal fiction created by a name on a birth certificate. So FoTL say that if you go by Mary:Smith (sometimes ‘Mary of the family Smith’) rather than Mary Smith, you can escape the legal fictional person.
And, excitingly, you’re then not subject to any contract made with you by the state through legislation (all legislation is contract, apparently). So you don’t have to get any sort of licence to drive, watch TV, pay fines of any sort, taxes etc.
There’s a lot more insanity than that. They’re a hilarious bunch.