Well I myself can't, because you've done an amazing job with that answer, koabac. Just some comments from "the atheist's perspective", i.e. mine and mine alone - we don't all meet on a Wednesday and synchronise our ideas :-)
I suppose these potential dangers, in their minds, outweigh the personal comfort of the those who find quiet solace and meaning in their religion. In the mind of the atheist, these people have found comfort in a fairy tale and are in denial of reality, which they consider psychologically unhealthy.
I'm worried about the dangers on the big scale (you mentioned the scenarios linked to the potential for manipulation; whereas scientific thinking teaches you an individual critical approach and encourages questioning authorities). I think most atheists don't worry about "psychologically unhealthy" thinking in individuals - to each their own.
where the reach of science ends, being okay with the idea of "I don't know" and enjoying and contemplating all the wonders and mysteries of life and the universe without being handed easy, convenient answers.
This is why I'm quite surprised that some people here have seen "searching for answers" and "wondering about the universe" as a sign of belief or spirituality. It is just human, and the starting point for both religion (or spirituality) and science. It's just that these fields have taken rather different roads to deal with such questions.
About the labels (the issue of "atheist Neil" or "agnostic Neil" has been mentioned in this thread): There are very very few "atheists" according to the narrow definition of this term. You'd have to say "I KNOW there is no God", which no one with a scientifically inspired mind would ever say. So we're all agnostics then. But then only few religious people that I know would say "I KNOW there is a God". Also agnostics then?
I suppose most of us, believers and non-believers, are sitting towards opposite ends of a continuum, which makes distinctive labelling quite tricky. The use of the word "atheist" has come to refer to people who live their lives and make their decisions based on the assumption that there is no God (evidence, probability etc.). Hence the term "agnostic" has declined in use in the last ten years or so.
I just sometimes wonder whether some people think atheists walk around with only their beloved facts in mind, viewing everything that is emotional, intuitive, moving, heartbreaking, incomprehensible, confusing or transcendent as irrational irrelevant nonsense, and thus cannot be creative or artistic. We really don't. (Evolutionary biology has found that empathy was in all likelihood the biggest driving force to make us a successful species, so... it's only natural. Sorry about that, I'll see myself out.)