When an idea has resulted in the deaths of a significant portion of the world's population at the time, it's healthy to regard it (and similar ideas) with a bit of skepticism.
I'm specifically trying to avoid the whole "no true Scottsman" argument by saying these aren't necessarily examples of how an actually functional communism economy would be, but I do wish you could be consistent with your terminology as socialism and communism are distinctly different ideas. I'd also like to emphasize the mild sarcasm when I used words such as "merely" and "complete and total cooperation",to close out this conversation which I have little more to contribute to.
"If only every single person would..." is not how you create policy where people are actually free.
(Seriously, have you read about all the escape attempts over the Berlin Wall?)