One thing that always annoys me a bit is when people say "life is priceless" -- because our behavior is certainly not consistent with that. We could save many human lives via a myriad of expensive policies -- for example, requiring all cars to have tank-like protective shielding. The fact that these policies are not implemented implies that we're perfectly happy to place a price on human life -- it's just a question of which particular policies save enough lives to justify the cost.