Just commit, no matter the response. Adding /s is akin to explaining a joke after you tell it. If someone doesn’t understand or pick up on the sarcasm, it’s not your responsibility to spell it out for them. You add /s because you don’t want to be held accountable.
I wouldn’t say cowardly, but I concur that /s is used by the feeble and weak of society. If you cannot tell that I am being sarcastic when I say that I am going to cut you into small pieces and feed you to the hounds, you deserved to be cut into small pieces and fed to the hounds.
Okay calm down, Ramsay Bolton.