Hmm. In Bz, when I take the Seatruck into the Crystal Caves and I come across one of the four shadow leviathans, I've stepped back from piloting the seatruck just before the leviathan attacks and the leviathan's script of going into attack mode suddenly switches back to its swimming routine and goes on its way. It didn't attack me. But that may be a glitch if "only leviathans" poll choice is leading. Idk.