There is a regular ROK player called a n d y who admitted this week that he uses sight jack in game to track enemy players. He often moaned about hackers in the past but has obviously decided to take the easy route and join them in their cheating ways. He frequents all the well known heavy weapon Gulch servers so is a fairly regular visitor to the ROK server. Just a heads up.
P.S. When I tried to confront him about it he actually suggested that because SJ is available in HAC2 then it must be ok to use in a server