I do not know this about frogs in general but we can take some educated guesses...

You can feed most herps cooked and unseasoned prawns and shrimps - so I would guess the same with frogs (raw ones can make your pets sick - something about chemistry - so I wouldn't risk it)

As for ghost shrimp; I would say no. They are bottom feeders, and pacmans are not great swimmers, so you could put them in there and I bet they would go greatly ignored. As for using them on tongs and waving them infront of the frogs face... I still wouldnt, again shrimp have bacteria in their shells and I wouldn't want to risk the exposure to foreign bodies.