Every so often when i am on my lvl 50 WS i will get one of those types that whine about the possability of voids or cysts. When that happens is just nicely explain to them that it is ok if they are afraid of the big mean shadow cyst and that they can go hide in the corner when they and everyone else that is scared needs to go hide and wet themselves. Then i inform that while they are busy with that i will be busy soloing the cyst and whatever large spawn is around it, and will inform them when it is safe to re-join me and the rest of the team.