Which Springboks have the most yellow cards?

Very interesting reading:

Number of Yellow cardsAnswer 7Bryan Habana 6Schalk Burger 5Victor Matfield 4Bakkies Botha 4Flip van der Merwe 3De Wet Barry 3Robbie Kempson 3Willie le Roux 3Francois Louw 3Breyton Paulse

I would have guessed that Schalk Burger would have had the most.
If you normalise the data based on the number of tests played vs yellow cards, it is a different picture. Flip Van Dermerwe gave away more yellows on average per test 

I'd be willing to bet the majority of Habana's were due to him being to fast for his own good, taking out a player in the air chasing a kick. 

Puts in to perspective the so called bad boy perception most have of Etzebeth

That's mainly casual fans that saw Eben feint a head butt at Sharpe that one time and when he had the whole English team trying to throttle him. 

Etzebeth is massively intimidating no doubt and makes his presence known without taking it too far which is perfect