It is not cheating. I've played on many sites, and have seen some cheating here and there. There are just some very very loose players on FJ. Also if you have an overwhelmingly large stack it can make sense, against the right opponent, to just shove over and over. Because as the largest stack you only have to win once in order to get all the chips. So you are actually ahead when you consider the odds of winning one hand on x6 shoves, even with inferior hands. Or more likely he was just some drunk crazy Argentinian ...

Bottom line, I've found the cash games extremely loose and profitable. And yes, those loose players will have their moments in the sun.