If one is saved one doesn’t “glibly go around sinning”. You’re talking about someone who hasn’t been regenerated. They are playing church - not genuinely saved. There are many on that day who will say “Lord, Lord, have we not by thy Name prophesied, and by thy Name cast out devils? and by thy Name done many great works? And then will I profess to them, I never knew you, depart from me ye that work iniquity.” Matthew 7:22-23. Clearly works salvation/playing church is a one way ticket to Hell.