There are quite a few high ranked players that hack, so don't be surprise if you see a few more players with high ranks get banned. It's just a matter of time and Nexon is taking them down one by one.
Although, It's the hacks/cheating that got him that far in the first place. Sooner or later your bound to slip up. I kind find it hard to believe that someone would start hacking at that point in their game career.