IMO I think it shouldn't be optional for other clan members to give donations to members who died. Although being a good samaritan doesn't hurt, I wouldn't hesitate to give money to someone who died during a pk trip.
With that said, I think it should be considered that clan members should have AT LEAST 500k in their deposit box before going on an official pk trip. That way they can rebuild on themselves. Making donations optional for clan members who died can be abused by newcomers in many ways.