One thing that would help would be if we all restrained ourself from ever being sarcastic here. I don't mean we should avoid irony, which has an important place here - they are very distinct concepts. And I do not think thta sarcasm has an important place anywhere.

Here is what H.W.Fowler wrote about this distinction in "Modern English Usage"

sarcasm does not necessarily involve irony, and irony has often no touch of sarcasm. But irony, or the use of expressions conveying different things according as they arer interpreted, is so often made the vehicle of sarcasm, or the utterence of things designed to hurt the feelings, that in popular use the two are much confused. The essence of sarcasm is the intention of giving pain by (ironical or other) bitter words.