"(!)"works well I think. not that i've ever used it mind... maybe I will in future... maybe.
Geekosaurus said:
We shouldn't be making it easier for people to understand sarcasm. If people can't understand it we should mock them in a sarcastic way.
indeed, but its not about understanding sarcasm its about telling when sarcasm is being employed, which in plain prose isn't always apparent, or at least is open to misconstruction.
I've certainly seen plenty of situations where people have misconstrued a sarcastic comment and all hell has broken loose.