Agnostics may threaten agnostic atheists with a burden of proof.

[stone space]

49. I guess that I'm just an old school atheist. I believe that there is no God or Gods.

For half a century, I've simply called myself an atheist, and agnostics just called themselves agnostics. (Sure, there are shades of grey, but that's pretty much true of everything, and the trichotomy of theists/agnostics/atheists at least discretizes the spectrum at a finer level of granularity than a linguistic dichotomy would.)

Now, agnostics on the internet (though not in real life, as near as I can tell) are calling themselves "agnostic atheists", so I suppose that I had better start calling myself an "atheist atheist" whenever I post on the internet, just to distinguish myself from the folks who used to call themselves agnostics.