Well, I have lurked in this forum a long time, as you can see by my post count, I literally made my account to post to this.
FFXIV has one of the BEST communities in a MMO in my opinion. I would like to hope it would stay that way, but I have noticed more and more rudeness towards players in general. I wish people could be more understanding and realize even IF the tank is bad or healer doesn't dps, or the dps doesn't do proper rotations, it's just not going to add that much more time to the dungeon. If someone is clearly afking and dancing or w/e (I literally had a healer take a SHOWER during Prea) Just communicate with the party and remove them. And if all else fails, click U, click leave party, and it is over.