Some Atheists are making this really weird claim
Listen to the end to hear my new goofy song "MY BABY AINT NO ATHEIST!"
The claim is that Atheism means "lack of belief in God".
By doing this the Atheist is (1) recruiting a bunch of people into atheism without there consent, because by this definition agnostics are now atheists and all small children are too. (2) hiding from the philosophical discussion about atheism so that it wont have to be defended reasonably.
Are babies athiests? no
baby photo used by permission from Stock.xchng photo#1281127