God. I keep seeing this on the Internet, both from theists and horribly enough from atheists. People keep capitalizing the word god. For example, one might write that "it hasn't been proven a God doesn't exist." This is incorrect usage (and logic). One name of the Judeo-Christian god is God, but the word god is not a name or proper noun, so it should NOT be capitalized.
Theists write "God" all the time, even when referring to an undefined god. I get the impression that when they say "a God hasn't been disproven, so it's just as irrational not to believe", they really only mean that it's as irrational not to believe in their specific god as to believe, while disbelieving other gods is rational; and let's face it, what they really mean is that it's more rational to believe in something for which there's no proof than to disbelieve, just because there's "no proof against it." They don't seem to realize it's not irrational to dismiss something no one can say is there, while it is irrational to believe in an obviously manmade, contradictory definition of a god, when the possible definitions are far from finite.
But we all know theists can't think straight regarding religion, so it doesn't bother me too much when they capitalize the word god. However, when atheists do it, it fucking hurts. By capitalizing the word god, one gives it more respect than it deserves, like it needs to be revered. I get why people do it; they have associated the word god with the god called God, so they think it is grammatically incorrect not to capitalize.
I admit that I've done it in the past, as well, and sometimes I do it without thinking. This is a kind of brainwashing that affects us all, and even trivial bugs like this one must be crushed. So, just remember, god is not capital. Or better yet, God is always a god, but a god is not always God.