Given the manner in which you phrased it I think anyone who thought you were being critical of the coach simply wanted to be a troll!
The real question here is the conduct of the ref. Had the coach been warned? If what was said matched what has been posted, I have no doubt it does based the character of the poster, then why would the Ref feel such a comment was worthy of a card?
Seems to be another case of a ref being over sensitive to having thier ability questioned (not that I see the commment as questioning the refs ability). I am guessing the coach wanted the ref to control the play a little more, it was a one sided game and there was no need to let the play get out of hand.
Shame the coach is questioned on her behavior, and the ref gets a free pass! The coach was trying to protect her players, who is the ref trying to protect by carding the coach?
Who holds the ref acountable for players that are injured when they fail to control the game? Does anyone track the "stats" of these refs? I know for a fact there are refs that call some players harder than other, I have seen it, and Realmccoy I know you know of at least one.
PS Do not let those who are always looking to stir the pot stop you from contributing more than just numbers! I think we could have a whole thread/section devoted to reffing problems! Not that all ref are bad, but there is a problem with the current system)