No. Death to the sarcasm mark.

But how else would these freckled ninnies know when sarcasm is implied, if not spelled out explicitly for them in the form of some putrid postscript marking?

Are you serious? If not you forgot /s

Sometimes just assuming others aren’t being antagonistic is best. You’ll live a better life.

Explain how it wasn't clear as a statute gallon of 277.274 cubic inches of water.