It is sad but the nature of it. I myself when i first begin was completely new to mmos but have always and will always treat players with respect except of course for some rage quitters.
Also i do agree that if you mention you are new to a dungeon and such that may help. When taking members of our FC to do end game stuff for instance, i always tell the random players that such and such is new.
Find a Free Company that is new player friendly, have fun and enjoy the game.