many people can't convey whether they are being sarcastic or not which confuses people. should there be a sarcasm highlighter with the bold italic link etc?
That was a test. Sometimes you just need to figure out how each individual types to figure out what is serious and what is not. Or, as said, use typed tags such as /sarcasm.
Uh huh. Well, the usage of non-standard characters presents a problem I guess. At least we'll definitely have UTF8 support for AG. Which means all those accented characters won't result in a jumbled mess.
As for conveying sarcasm, use tags or BBCode to your advantage. You can even state plainly that you are being sarcastic.