Larval feces? Uhh, no. Larva in any form, wriggling and alive or freeze-dried? Sure, maybe as waste management, maybe even to remove dead skin from burn victims, but never, never on my dinner plate or sneaked into my granola bars.
Bugs are already being used to feed caged pets such as lizards, snakes and turtles.
They make great bait. Wax worms.