Can't believe some people really think Jos Butler staged or deliberately engaged in targeted sledging antics. This is why watching highlight packages is dangerous to start forming opinions, as you don't see the whole lead up and battle.
In Cape Town, Philander obstructed Jos from retrieving the ball cleanly when it was being thrown in from the field. Jos told him to get out the way and to move, Philander then tried staring him out, Stokes then chirps up saying "Don't stare him out, he's got a point mate". You then see the incident which got reported and Jos fined, which I agree with.
Then yesterday Faf does exactly the same thing, maybe to try and wind Jos up again? Someone then calls Faf an "idiot", which I think was Broad but Faf may have thought it'd come from Jos. So Faf turns to Jos saying "don't call me that" and gives him a gentle shoulder barge/nudge. In the interest of fairness over the Test Series, I hope Faf also gets a match fee fine.
The long and short of it though; there was no pre-meditated sledging in those aired instances! It was just heat of the moment stuff, when playing a competitive game at the highest and toughest level.