That was not really the case from what I remember. There were a huge amount of instances that were run by strangers, even from the same realm. That is why there was the constant "LF 1 tank for heroic XXXXX" being spammed everywhere. In addition, you would end up with a lot of jerks back then too. Wiping for 30 minutes on 1 pack of trash was not always condusive to making people happy. The blame game was very apparent back then.