Unfortunately, the very design of the game can be attributed to a degree the nature of the player base. Square built a game focused on mindless, zero thought, repetitive grind fests that would test the patience of the Pope let a lone the general populace. As several have mentioned, while I am not excusing outright rude behavior, having to do the same instances thousands of times over and over and over for tomes, for maps, for alexandrite, for light, for etc. etc. etc.... people at times just get frustrated and impatient. My best suggestion is just to join a FC and group with them 90% of the time. That is what our FC does and we rarely even interact with trolls or the general dinks of the world.