I wouldn't say that there has been an increase. People have been terrible to each other, continued being terrible to each other, and will still be terrible to each other. No matter if it's the open hostility, the use of profanity, or, my favorite, the passive anger of a dot dot dot (...) to let us all know how insufferable you are, it's been a steady thing since the launch of the game. A bit of patience and constructive criticism goes a long way toward any duty finder group actually working together better. Hostility just drives groups apart, and if you feel like you need to be a jerk to address a problem, you should vote kick the player if it's gotten to that point or, perhaps, you are the problem.