Look, while I know it can certainly be frustrating there is something to consider here: This could simply be someone playing on console who, for them, this is their first MMO they've ever played. Hell, I don't know about you but every console game I've played online, you eventually end up with someone on your team who is drunk/high/doesn't care in the slightest when it comes to the actual objectives or gameplay. But beyond that, you just end up with folks that want to chill, play their way, and not talk to anyone.

This could very well just be someone who bought the game to play for fun like they would play any other game. And they couldn't care less that people are talking(and pay no attention to the chatbox as I don't either if I log onto some online shooter or something. I have other things to do). And even if they did look, they don't know what a 'tank' is because that term means nothing without the context of MMO terminology.