It's not exactly fair really, the religious and the faithful get to believe all sorts of bat-shit insane things and never get called on it, but we have to defend every inch of territory we have.
That's ok with me though, see as an atheist I have science and logic on my side.
But if you are going argue logic, be sure you know what you are talking about and how to do it.
Thanks to Hemant Mehta, the Friendly Atheist (the guy who sold his soul on eBay) I now have a link to share.
A link to the larger one is here: http://www.informationisbeautiful.net/visualizations/rhetological-fallacies/
I have seen each and everyone of these used in arguments against me before.
Here is an example of it being used to combat the Anti-Same Sex Marriage speech of Cardinal O'Brien of the President of Bishops' Conference in Scotland.
Click for larger or go here: http://infobeautiful2.s3.amazonaws.com/RhetoricalFallacy_SameSexMarriage.png