Looting Rules

[Springbock]

I was camping grimrot, being doing it for days on and off. I log in as usual to check, no one there, I know roughly he respawn time. 20 minutes later a player turns up, didn't get his name but just a few minutes later he spawns. I pull him to where I have my alt logged ( you can see where this is going) and kill him, the player is following me to where I kill him. So i just ignore him, log out and log into my alt, I get back just intime to see the corpse despawn. The rot time hadn't expired unless its alot faster than standard timer and the player (a druid) was no longer there, no one with his guild tag was in the zone. Should I have spoken to him and tell him not to loot the corpse, I'm assuming it's MQable too?