I have a bit of a habit of playing 1.e4 with the follow-up 2.f4 in lightning (1 0) games.
In response to 1..e5, it becomes the King's Gambit. Apparently, against 1..c5 it's known as the McDonnell Gambit and against 1..d5 it's the Williams Gambit.
I'd like to know if there are particular responses in Black's first two moves which mean that proceeding blindly with this kind of attack is a bad idea, and to slow down and play more cautiously instead?