No matter how often the various myths and stereotypes about atheists are shown to be ignorant fallacies they continue to be thrown about. It is essential that we not get discouraged. The only way to deal with them is to steadily pick away at them. Even if it seems redundant and pointless we need to continue talk and write about these myths and stereotypes.
A recent piece on Alternet, "10 Myths Many Religious People Hold About Atheists, Debunked" by Amanda Marcotte, is a good example of this type of persistence. Other excellent pieces on this topic include Sam Harris' "10 Myths - And 10 Truths - About Atheism", Greta Christina's "Eleven Myths and Truths About Atheists", and David Silverman's "The Top Ten Atheist Myths"
There are more than ten or eleven myths but you get the idea.