That's interesting that you bring that up, I have just been noticing how loads of questions on atheism have actually been coming up more recently.
In addition to which, I've also noticed that rather than people actually making an attempt to answer the questions which are being asked about God related things (which you don't have to agree or believe something to just answer a question), they are actually responding with criticisms of people.
I'm sure many of these answers have valid points, but they don't answer the question...which kind of misses the point of the 'Answers' section of the site...
In direct response to the question posed here, I haven't noticed many 'fanatics' on this site specifically, though maybe I haven't been around long enough. I think it's possible for some people expressing strong views may put off people who don't share in similar beliefs.