I just kinda told everyone straight, I think I can be abrasive sometimes, I stopped being polite cos every time i tell someone nicely its just like more incentive for them to try make me say "ooh god is back in my life" so every time someone talks about god around me I just laugh at them.
My folks took it rather well. I was raised Lutheran, so I've been on both sides of the coin. Of course they would want me to 'believe' again, but they didn't raise too much of a stink about it. Now my one sister on the other hand is a different story.
"So where do you get your morals without a bible?", to which I respond, "How about logic, reason and common sense?" "Well, then you're just using the abnormal part of your brain.", to which I respond, "No, I'm using the rational part of my brain." That shut her up.
And my mother even acknowledged the fact that when you read the bible with a realistic attitude instead of a faith attitude, then it is utterly ridiculous. I think explaining to her that when I did that, I realized how stupid I had been for believing in it at all, and then I felt more free than ever. Best feeling I ever had. I think that's when she knew that I was serious. Since then she never has pushed the issue.
Most famous recent person for being converted to atheism, just by reading the bible and its origins:
Started out as a fundamentalist Christian, studied to become a Biblical Scholar, became a Professor of Biblical Scholary, and along the way also became an atheist.