Could Christian Forgers Justifying Lying?

Yesterday, in response to a question, I started to discuss the age-old problem of literary forgery (authors lying about their true identity), and specifically the question of why Christians would engage in it.  In my two books on the topic I spend considerable time trying to demonstrate that forgery was indeed understood – in antiquity – to involve lying, and that the authors who claimed (falsely) to be Plato or Galen or Peter or Paul knew they were lying.  But why would they do that?  Especi...