Think it really depends on the situation. If its a newbie dungeon or someone with a sprout, I am always willing to forgive or let things slide or offer up advice. Its when they are in an 80 dungeon and still don't even know the basic of rotation (BLM I had in Mt Gulg >.>) to the point even a level 60 would go "That ain't right even by our rotation" or doing the obvious mechanics completely wrong. The giant circle with arrows pointing in has not changed meaning just cus you are in a new dungeon. That is when I feel rage building, though I usually will just vent to FC over discord, more so making fun of them as I am usually met with hostility or sarcasm no matter how sweet I try to phrase or offer help, or in the case mentioned I was greeted with silence.
My post obviously meaning to be for things that should be common sense by now, not to be applied for say learning parties or newbies.