Quote Originally Posted by Peasant Phill View Post
Perhaps typing "[/SARCASM]" or something similar can do the same and be a lot clearer than a symbol that few people know about.
But that strips the sarcasm of any elegance it might have. It's very blunt and takes away the ability to enjoy it because your eye spots it immediately and prepares you for it, which ruins the effect of it. A different punctuation mark allows for the reader to go about and take in the sentence without any presupposition of its contents and then receive the context at the end.