You know, I'm going to have to change my answer again. I said before, that for them to fear it, they would have to be agnostic, but that just isn't the case. They might believe whole heartedly that there is no God, but, as is with any belief, there is always the chance that they are wrong. Their fear might not be very strong, and there might not be very many who feel this way, but I think that there are some who do fear the potential for a judgment.