That's not that bad is it. Yes, it's wrong to say someone cant criticize something they couldn't do better, but it wasn't that offensive was it? I'd say a bit of down voting would have had the desired correctional effect.
In the spectrum of inappropriate things to say, this is far from the worst. My point was that 'Fuck you, Jason' is never appropriate. I don't think he would have been hell banned had he said 'screw you' or just omitted the three words, but saying 'Fuck you, Jason' crosses the line (and to be fair, I don't disagree with Sabat's point)