I Believe they need to set a limit to this stuff.
which applies to the Greed selection.
Like example if I have 50 paladin and a 50 dragoon or a 50 warrior.
The person that joined the same group has 30 paladin or 30 dragoon and a 30 warrior.
Would not be able to greed the item from under you unless they had the 50 job.
I mean it is done with glamour gear, you cannot glamour a 50 item to a 30 item so it makes sense, I don't see why it ain't the same for dungeon gear unless their item drops for their job.
Most would use it to grand company points even that should be locked to job specific items, if they don't have a 50 paladin and trying to trade a 50 paladin pair of pants its blacked out till they get to 50.
which would force people to level their other classes so dungeons are full.
also I ain't saying they cant greed it, though only if the same group of people have low jobs as well, though if someone has a 50 over their low end job, they have first strike.