Your right, the billboard you described isn't offensive, and atheist can be good people...but so far I haven't found one on this site...
I have to ask what you base that on. all you know about me is what I talk about on this forum. how much community service have you done, by yourself without anyone telling you you should.
I have worked in a homeless shelter, donated clothes, donated money, and advocated for causes that are important to me. I'm no Mother Theresa but I'm pretty sure that's more than most do.
how much time have you spent with a disabled child trying to help them fit in to society.
None, but if they oppurtunity arose I would.
How much times have you donated blood, because it could save lives,
I have not donated blood.

what have you done that allows you to look down on me from a "moral" high ground.
I have called you an idiot and such because you ignore the majority of evidence because you it disagrees with your faith. if I called someone an idiot because they still believe Zeus lives on Mount Olympus even if I showed them no one was there would that make me immoral?
Edited just for quote formatting.
I would think it was rude to call that person an idiot... let them believe Zeus lives there. It makes no difference.