1.g4!? Why not? How to play Grob?


:-)
I like openings like this. Often the opening theory is known by you and not your opponent so the disadvantage of the "bad" move is outweighed by the knowledge of the position and traps.
This is why I play a lot of Gambits.
Good luck with it.
There's a nice Chess Mentor analysis on defeating the Grob I think. Worth checking out.