![[Image: columbus_dylan.jpg?w=600&h=275]](https://rantsandrage.files.wordpress.com/2011/07/columbus_dylan.jpg?w=600&h=275)
Of course you can, Dylan. You can take a card to your mom on Mother's Day and donate blood twice a year. There you have it - proof that atheists can do good.
Clearly, there are atheists who act morally just as there are theists who act immorally.
But this is a strawman argument.
Theists don't say that atheists can't behave well without God, but two questions are not answered by your billboard:
1. How would you know that you have acted in an objectively moral way?
2. Who decides whether your behavior is "good"? You? Your friends and family?
What if all of your friends and family are psychopathic killers who think you have done a good thing by robbing a liquor store without leaving any living witnesses?
Is that being "good" in your personal opinion, Dylan?
I think the reason billboards like this are being purchased is because atheists recognize that the Moral Argument is one that they cannot really refute.