Sarcasm is a rhetorical device, used to make an argument by stretching the proposition you’re challenging, so it seems to me that @Ultra Vires was challenging the counter-argument being made against him.
“A terrible attempt at sarcasm” is, to me, a comment on the failure of a counter-argument that is being made.
But note as well, the definition of sarcasm. Here’s the Wikipedia definition, but it’s common to dictionaries:
My bold.
If sarcasm is used to “mock someone”, isn’t the use of sarcasm attacking the poster, not the post? So if UV is criticising it as “terrible sarcasm”, isn’t he drawing attention to what he sees as a personal attack? Is sarcasm itself going to become suspect, because it can be seen as personal attacks? There goes a useful form of argument.
GD has always been a raucous place. Not the Pit, but there’s always been strong criticisms of the arguments being made. If we have to mind our language in the way suggested by this moderation, it will become more difficult to critique another poster’s arguments.
I fail to see how the phrase “horseshit argument”, and critiquing the rhetorical devices another poster uses, is an attack on the poster.
And note as well that UV’s comment about “A terrible attempt at sarcasm” was made in response to Moriarty’s comment that it was “well-crafted sarcasm”. UV was disagreeing with that characterisation of the sarcastic argument. Moriarty was approving of the rhetorical device; if UV cannot express his disapproval, then the argument is unbalanced.
Really, it keeps coming back to the use of “horseshit”. If that can’t be used in GD because it is “uncivil”, then a lot of other strong adjectives are also out the window.