I am not clear on where I am supposed to have claimed equal effects on prestige.

People writing serious books about how there are no UFOs would probably have much the same effect as if they wrote serious books about how there is no God - it would make people think that there was a real issue there that was worth discussing and spending time on.

Ridicule is a bit different. Books by comedians taking the piss out of religious idiocy would not induce the same type of comments from me. For example, note that Pat Condell [http://www.patcondell.net/] was not in my list - even though he evidently spends a lot of time on religious issues.