Unlike most games, WoW lets you “earn” experience by being in a group with someone of far higher level than you, watching as he slaughters hordes of enemies at your level. Sure, you get reduced experience, but your xp-per-minute is great at 0 risk.
At least on my server, low-level characters seem to expect others to do things for them. I presume that most are alts. It is easier to ask guildmate Bob to run you through Deadmines than to find a group for it, and you need not worry about losing rolls on loot. And could you do it when I am at the minimum level to enter the dungeon, so I can get better xp and loot? And could you summon me, because I cannot get there safely on my own? I occasionally see people LFM for groups, but they are usually looking for someone to run the dungeon for them.
The cycle: you can’t find a group because everyone has level 80 friends run them through, so you have a level 80 friend run you through.
This becomes a problem when you slip and actually group for group content. A Warrior invited me to a dungeon then asked who could tank. All the enemies in the place (and everyone he invited) were higher level than him: great for him! Turns out I was one level above what the meeting stone would summon: even better for him, and not his running problem. Still, I wanted to finish some quests, so I would pick up a few other quests and meet folks there. Except that three of five stood in town and mentioned occasionally that they would like to be summoned. When I passed through Stormwind on the way there, I noticed the Warrior arguing with the religion spammers IN ALL CAPS that ALIENS pretended to be FALLEN ANGELS in the Bible and would try to DECEIVE us in COMING YEARS. The three were still standing in town when I got to the meeting stone, where the other member had gone AFK, got ganked, and was still AFK when I quit after waiting out the hope reservoir. As I left, someone mentioned that he might be a bit slow because he was painting his house.
This presents a higher level of crazy than usual, but standing around with a sense of entitlement seems to be a norm. Give me what I want; give it to me faster; if I actually have to spell out what I want, ur a griefer or noob lolsauce.
In LotRO, we sometimes become annoyed with new players for not already knowing what to do when we have run the quest line four times before. In WoW, they seem to become annoyed with new players because newbies expect party members to “show up” and “do things.”