Believe it or not, I did make the link between the [italic~irony] legend in your display name and what you wrote, but even knowing it was irony, I couldn't guess what you meant given the brevity. Sarcasm and irony both requires a shared context to be understood, and that's why it's difficult to convey through public written text. The problem isn't so much the "written" part than the "public" one since there's a low chance anyone will have the same context as you when reading your words.