While I agree it was a dud decision, just because the ref is wrong doesn't give Smith the right to carry on like he did. What happened to the no talking to refs after a penalty, the ref should have called play on and let Souths run at him while he was offside. His ploy worked in giving his team a breather and getting in the refs head.
Refs absolutely butcher heaps of shit in every game, he should be used to it.
Total lack of respect, and he won't give refs any until they either bin him or allow play to go on while he carries on.