The recent American Atheist billboard ad campaign in Alabama has me irritated. As an atheist, I think the billboard is indeed insulting and in poor taste. The smug message of "we have the truth and you don't" is arrogant and demeaning regardless of your ontological perspective. American Atheists, if you want to attract more to the cause, be creative, not stupid.
The Skepchick, Rebecca Watson, sums it up nicely with her satire and wit here:
A Shitty Ad Campaign
