When I from time to time play 3.(Nf3) g5 as Black and when I face 4.h4 - of course is 4. ... g4 for Black, and of course it's 5.Ne5 for White (the Allgaier gambit 5.Ng5 might be not bad probably only for blitz games)
King's Gambit

Littlebuddy.....
My notes and recollections on H4 dont come from legal sources such as:
CREATIVITY and BOOKKNOWLEDGE ...
My noting is for "over the board play" that comes in handy at tournaments!
Im sorry I cant play online against H4 against you , that wouldn't be cool...
we can play something else, you appear to be a good slav player , and I like playing closedlines , can we d? do that instead?
i open queen pawn. i like ur enthusiasm . ill play a queenspawn with u.
i beat a 2424 rated player with it , in this lifetime before....once in a while i loose.
and according to "rybka 1.0 beta" d6 after knight e2 wouldve violated the fair play policy of chess.com!!