atheism and agnosticism become a religion when you start making those facts crucial parts of your life. when you go around broadcasting your world view, even if its "i dont know lol", then it enters the realm of religiousness. if you just live your life as an atheist/agnostic and dont really focus on it the way others do, then it doesnt cross that line. this is obviously not how more mainstream religions like christianity are defined before some wiseass brilliant deduces that contradiction and feels the need to point it out. its just my personal view on the whole 'is it religion' debate