Scrap picking is a common job of robbers, thieves, PKers (Player Killers), and such. They were called Scrap Pickers and their job was to pick items that dropped from the killed players in the war or large-scale battles such as that one in front of Vi and the company. The job wasn't only limited to large-scale battles. As long as there was a PVP battle outside the arena, Scrap Pickers could always steal the items dropped from the defeated players.
Of course, it was much safe to pick up scraps if they played it in a large-scale battle.
But it didn't change the fact that Scrap Pickers were hated by a lot of players. After all, who would get happy if the loot you should get from winning a fight against other players, would be stolen by some annoying Scrap Pickers hiding in the dark?
But then again, being a Scrap Pickers really felt good. Especially, when you hit a jackpot and found a large-scale battle where both sides suffered great damage.