But I also think that attacking players, even your own, might bee too much of a disadvantage.
Even allways hungry gives just a very small (1 in 36??) chance of losing a player, and then you'll only lose a gobbo.
I would prefer the idea, dunno what it was exactly, thet on the roll of '1' a randomly selected vamp would do the nasty thing.
Or maybe that only one vamp can attack someone per turn (you stop rolling as soon as you 'failed' the roll for one player) This however might even want you to fail the roll in certain occasions (perhaps not too good an idea after all ...

I do think some changes should be in order for OFAB ... at least somewhere ... not??