That is wrong.
If you noticed in M1 morpheus stated that he saw the dead liquified inorder to feed the living. The port holes were only for ejecting people who woke up and would not go back to sleep. If you notice in World Record the machines did everything in their power to put him back to sleep. If that didn't work they were ready to flush him because he would have contaminated the system. The samething happens to anyone that wakes up and relizes that they are not in the real world/The Martix anymore.
When a perosn wakes up it like tossing a stone in a still lake. Your imput/ouput signals change. And once they do you light up like an Xmas tree. Thats the main reason why they use the red pill. It blocks that signal inorder to make it easier to find you.
Also If you remember in M1 when Cypher was talking to Agent smith, he told him that he didnt want to remember ANYTHING. If he had even the smallest idea that he was living in a dream world, there would be a great chance that he would wake up again. Cypher didnt want that to happen.
The only exception to the rule so far would be the Kid. He willed himself out of the Matrix on his own. Did he activate the port hole on his own? We dont know yet. But what we do know is Neo and the gang had him on the ship at the end of that story.
So alot of these questions will be addressed in Nov.