I don't know about other Atheists, but I get this question a lot when people find out I don't believe. I know Richard Dawkins has gotten it a number of times and I usually answer the same as he did, which is to turn the question back on the asker, what if they're wrong about Zeus, or Odin, or the Great Juju on the Mountain?
Anyway, I've also gotten the expanded version which is, "What if you're wrong and you die and meet God?" To which I usually reply, "Then God's going to have a damn lot of explaining to do."
But the other day I was thinking about this question and I thought, why be so serious about it?
So take the question, what if you're wrong and you die and there is a god... what do you do?
To get the ball rolling, I'll give you the silly answer that inspired me to write this discussion:
I'd ask god exactly where Felch* lives and to let me go there and fuck with his cynical thinking, because let's face it, if almost any major religion is right, then god is just the sort of prick who would let me do it!
*@Felch (or whatever the fuck weird symbols you're using this week), you know you're my absolute favorite Grogan, right?? :-)