So a group of 18 people farm up:

A ridiculous amount of trash mobs to get pop items for:

An NM Limule
An NM Clionid
An NM Mandragora
An NM Corpselight
An NM Courel
An NM Eft

As well as taking the pop items those drop and farming MORE trash mobs to pop:

An NM Hectaeyes
An NM Scorpion
An NM Bat
An NM Cockatrice
An NM Manticore

As well as:

An NM Turtle
An NM Gnat
An NM Sandworm

Then pop:

An HNM Mandragora
An HNM Sandworm

To eventually pop:

An HNM turtle.

And when it invincibles and people run/kite in opposite direction in order to not get nuked while it's in that mode and one player happens to disengage after being the last person to touch it and it goes unclaimed. No one's dead, the group is in complete control, and you're only logic for taking the mob from said group is "Hey it went unclaimed"?

Really dude?

17 NMs and countless trash mobs farmed by a whole alliance in the spirit of good fun and teamwork Means nothign to you because "Hey it went unclaimed"

And you think this is "as designed"?

C'mon man, you're usually pretty sharp. How can you not see this goes against every thing the game's designed to provide? It's highly doubtful this is what Square wants for it's players... And defending theft or saying it's not theft is quite the logical leap...