I prefered solo dungeons instead of guild castles.
Guilds know that Magna, Karma, Berserk and Polish are too strong so they won't partecipate to that event
Maybe they don't know how to spend their own time in this game
I read a lots of offensive phrases everyday.
My advice, as told you @Higgings, is to put them on your ignore list only if it is necessary to do it
In this way questers have difficult to complete them.
Karma and Magna are farming there 27/24h and 9days/7.
If you tell them that they have to kill that boss for quest, most of them neither answer nor let questers do the quest trying to evade it.
It's unfair
Usually I can't report quests for this... It's unfair!
When I went in Hard Techno, the tank didn't suicide for to go back to entrance of the dungeon but after we beat a specific mob it pop up a teleport that lead to the follow room