How many people score runs when they are in bad nick? you can't single him out just because his technique isn't perfect. Also, surely the Saffa's would have seen that he looked weak on the front foot? They are international bowlers, surely they are clever enough to pick up and hone in on this so called weakness, however they didn't so they must have had quite a good reason not to? Going by all the video analysist software, someone would have picked up on his flaws, even in half an innings.