Ha ha, I'll skip sarcasm and pitch in with some sincerity that Lee was a soldier and a gentleman and yes, he could have raised hell after the war.
The big "what if" is what might have come to pass had Lincoln lived? It was the forces, carpetbaggers et al, turned loose by his absence that brought the harshest reprisals upon the South and is largely to blame for their lasting emnity towards the North, or so I have been led to believe. Whatever, happy birthday to the guy.
As an armchair historian, I'm always looking for a little more truth and don't get bent out of shape when proven wrong.