Apparently, there is Spoofer software that can't be detected today. The proof is at today's Pokémon Chicago Fest. In order for the crowd to spin PokeStops in the park, they have to first scan in a bar code on their ticket. This clearly is an implied message that they can't detect and stop spoofers.
How about if Pokefarmer create a non-detectable Spoofer program???
How about if Pokefarmer create a non-detectable Spoofer program???