The Internets Is No Place for Sarcasm!

Have you ever said something sarcastic while IMing a friend only to have them get pissed off at you? This happens to me too often. It's something I still haven't learned. Sarcasm doesn't work in cyberspace.
Even in everyday conversation I get in trouble because people never know when I'm being sarcastic or serious. It's a problem that I'm trying to work on. I know for sure that I change the tone of my voice when I say something sarcastic but still, no one can tell.
Back to the point! How can we resolve this? Friends tell me to not be sarcastic online and that will solve my problems. My problem with that is, I CAN'T! I'm naturally a very very sarcastic person. It's just like saying to someone with asthma, "just stop breathing and it will solve your problems!" And that's just ridiculous.
I say, everyone complain enough so there's a sarcasm button like there is a bold, italics and underline option. If enough people complain I think there will be something done about it. So go out there! Whine and complain! Hopefully that'll help me from saying online before I'm sarcastic, "I'm just being sarcastic but [insert sarcasm here]." It's annoying.