Emoticons have pretty much taken over texting. It’s the sort of thing helps convey intent and tone, right? What if we used punctuation to do this instead?
Personally, I’m fully behind any system that includes punctuation for sarcasm:
The SarcMark (short for “sarcasm mark”) was invented, copyrighted and trademarked by Paul Sak, and while it hasn’t seen widespread use, Sak markets it as “The official, easy-to-use punctuation mark to emphasize a sarcastic phrase, sentence or message.” Because half the fun of sarcasm is pointing it out [SarcMark].
There’s a full list over at Mental Floss. Check it out.