Master Looting During Boss Fight

[Aliekin]

I posted this in PvE/dungeons as well, since I am not sure where to post it.

 

Players should not be allowed to switch to master looter during boss fights in cross-server groups.

 

I have seen players switching to master looter when the twins die in Brightstone, and stealing all the loot when the last boss dies.

 

This is a major issue. Brightstone needs to be farmed for crafting patterns(and stones), as well as weapon upgrades. I believe this issue needs to be combated immediately.