How to play against the Grob attack 1.g4 I am looking for resources/ideas (i.e. ECO doesn't seem to have a lot on this opening) to play against the Grob attack.
(Both for facing it and to prepare to play it as White).

So far what I have seen is very tactical, but I am looking for strategical ideas or the main branches to study.

For example what's Black best plan/ideas in the sequence below:

[FEN ""]
1.g4 d5 2. Bg2 Bxg4 3. c4 dxc4 4. Bb7 Nd7 5. Ba8 Qa8
I play the grob a lot, and i don't ever mind if people go into those main lines. That is actually what anyone playing the grob wants.

The easiest play for black is going with 1.e5 and a quick Ne7, Ng6, Nh4! This can't be prevented, the knight is hard to remove from h4 due to the weakness from 1.g4 and it hits the white bishop on g2 which white doesn't want to trade but it's either that or the ridiculous Bf1. That simple plan makes white look silly and gives an easy nice position for black from the opening.