i live in the NT for 3 years and spent a large part of that time in remote aboriginal communities. You would have to be a fool, extremely drunk, or both, to swim in the daly river. My best guess is they were from Daly River Mission, a small community on the river, massive alcohol problems there, and im certain crocs would out number people in that section of the river alone. I have no pitty on people that choose to be so stupid. Infact, have visit this community alot in the past, and knowing how drunk they would have been, if they didnt get attacked by a croc theyprobably would have drowned anyway.