Should Atheism proper include scepticism?

[TruthWorthy]

1.
It's called intellectual honesty. I am as sure a god doesn't exist as I am sure pixies do not exist, or the Loch Ness monster doesn't exist, but I cannot 100% disprove any of these claims.

2.
No, see 1.

3.
Because disbelief <> Belief in the negative.

That reasoning sounds more like skepticism than it does atheism to me.

If there were an acceptable method for proving something's nonexistance, And that method proved the non existance of "god", would you still be skeptical and doubt the reliability of the method?
Or would that evidence compel you to change your stance on the topic?