Well they really should ask imo,but if they are able to greed then thats really not an issue cuz the items do have a certain amount of time before they can be looted by others,yeah i know even that sounds lame but thats how it goes.
Now if you asked someone not to greed/loot you make sure not only to save chat but ss.
I had the same issue and prolly the same smart asses doing it to me.it's just as bad as that salsi sniper that follows you around and ks you're mob.
I seen people ask this guy to stop following them around and SharpShooting their mobs but yeah lol maybe one of those greeders is his alt LOL.but i think if you ask someone and you have proof that you asked them to stop along with some ss to back it up
I would say report them!!!for looting you oh and yeah if they are standing in you're loot where you killed a mob and they are waiting for the time to be up so they can loot/greed i think thats reportable as well.greeding following people around and ksing the mobs should have ss to back you're reports up.
Good Luck,Hope it changes for you.
And on another note about this shit i look at it this way,people should have respect for other players even in a KS map no matter if it's following people around and ksing their mobs,or following em around and greed/looting,you should still respect other players.