The user "elie1000" is referred to a strange story that took place in 2014. His name was discovered for the first time from the leaderboard of a screenshot.
The screenshot represents a group of friends and among this group there was the face of a user who had been erased. Later, it was revealed that the person concerned had died.
It seems that it is a rather unhealthy person, probably amused by the fact of sending screenshots by mail to friends of dead peoples avatars. It's unclear how Elie gets emails from Roblox users or how he can know about the death of some players. Maybe he uses some hacks but there has never been any proofs in the victims accounts.
Since the events that took place in 2014, there are other people who have received screenshots of the same type but we do not know if it is related to other stories. Victims of this person are usually close friends of the deceased. Some people were so scared that they preferred to change their username or even leave Roblox. There was a very strange event where a person received a screenshot that represented his dead friend while he was still alive, a few weeks later he died...
The relatives of the victim preferred to reassure themselves by saying that all of this was just a coincidence but the weirdest thing is that no one seems to remember or even know him and he has never been seen online in the years 2014 to 2018.