I call those who "kill steal" -"scavengers" much like vultures, who'll wait until the creature is near death, then kill and loot away from you. Surely, this is "impolite" to say the least but it stands to reason that the "wild west" format that seems to pervade
EU is hopefully a step along the evolutionary pathway. Yes, this IS going to happen but maybe within a few months (years...or maybe never), it'll get better.
All I can say is: be vigilent, look around you while you hunt, keep clear of green dots...(oddly enough, it used to be the other way around...)