Where am I dictating anything to any atheists?
In every post you make in this thread, you are dictating what the term "atheist" must mean.
I am clarifying what the term means.
By imposing your specific definition, regardless of what any actual atheists have to say about the matter, or any support at all beyond your own assertions.
I'm discussing common usage terminology.
No you aren't. You're employing the phrase "common usage," but without any substance. You are simply declaring that the common usage agrees with you.
A disbelief is not a lack of belief.
That is exactly what a disbelief is. Try one of the dictionaries you claim to be so fond of.
Furthermore, Merriam-Webster does not define atheism as a lack of belief.
Only if you insist that "disbelief" means "affirmative belief in the negative."
Either way, it doesn't matter as there is no doubt that the term atheism is being used by a certain group of people to include those who are inconclusive on the matter.
That "certain group" being essentially everyone who isn't personally invested in narrowing the standard definition of "atheism."
Regardless, it is not standard common usage for the term.
Sure it is. You can keep saying it's not, but you can no more dictate to everyone what "standard common usage" is than you can dictate to atheists what they do and do not believe.
Furthermore, it servers no purpose. Chris stated that it helps in arguments to broaden the usage of atheism. However, it is still pointless.
Using the correct, accepted definition of a term is pointless?
One has to wonder what your point could be, then...
Calling those who are inconclusive 'atheists' is not different from calling them 'theists'.
Sure it is. The latter is clearly incorrect, since these people lack theism.
And imposing atheism upon those who claim neither theism or atheism is not only absurd, it's abnormal.
There's nothing to be imposed. It's simply a factual description of their beliefs: literally, "without theism."
A lack of theism is non-theism. Which properly describes anybody who does not abide by theism.
The term "non-theism" does not exist in common standard usage. It does not appear in the OED, or Mirriam-Webster, etc. I had never heard of it until this thread.
And it's interesting that you'd suggest as an alternative to "atheism" a word constructed by swapping the prefix for an equivalent one.
And it's further interesting that the only noteable online source for a definition of "non-theism" (Wikipedia), includes the following:
"Non-theism has various types. "Strong atheism" is the positive belief that a god does not exist. Someone who does not think about the existence of a deity may be termed "weakly atheistic", or more specifically implicitly atheist. Other, more qualified types of nontheism are often known as agnosticism, or more specifically explicit atheism."