Yeah, you're full of shit. People do not get kicked as often this far into the expansion but they still get kicked for the stupidest shit.
I have been kicked when I was dutifully following the tank and NOT pulling for him, topping meters and generally minding my own business, I have been kicked because i was doing more healing than the healer as a Tank. I've been kicked for pulling for the tank. I've been kicked for opening my mouth and saying hi, I've not been kicked for being toxic, I've been kicked for AFK. Ive been kicked because I stupidly interrupted a mob because I was a "bot". I've been kicked for 20 different reasons since WotLK (and before when we had to make our own groups).
There are a million different posts on how there were times when people were kicked through no fault of their own and one post that says it's bullshit. Your post is a complete fabrication but the question really is "Why did you make this up"? I think there is probably evidence to say that you don't actually play anymore because you seem to think that it wouldn't be surprising if level 90s could clear lvl 100 heroic dungeons.