Hey Paul,
I think that people who parade as athiests for the sole purpose of being seen as superior are pathetic, and you shouldn't worry about them.
Anyone who is that superficial and pompous probably doesn't mean what they say, anyway. They just want to be noticed. Their beliefs aren't threats to you, I promise.
People who really believe in something actually live it, as opposed to just talking about it. That's been my experience/observation, anyway. A true athiest would probably be too busy working on their projects to announce that they're an athiest 24/7 (unless, of course, they try to put the ten commandments in schools. I'd have something to say about that ... but it would have little to do with how I'm an athiest, and everything to do with the first ammendment).
Take care,
felicity