Upon setting another player's permission status to visitor, said player won't drop their items on death. The setting keep inventory was OFF, experimental gameplay was OFF, and it was a vanilla 1.14.60 world. From testing, this only happens to players with visitor status, so players with member, operator, or anything else still keep their items. For example, one of my friends stole my fishing rod, so I put them on visitor. I then went to kill them and they did not drop the fishing rod. The fishing rod had just, disappeared.