[grim_squeaker_x]

Gani's don't actually have anything to do with how a person moves, if you change your gani to another one your onwall detection and the place where you are standing stay the same, so it can't be that by changing their own gani's they can enter a certain place...
Of course if I'm misunderstanding and they're changing the gani's of NPC's then they can use it to reach places they shouldn't be.