That doesn't mean that it's correct, morally or legally. Opinions are ideas, not facts.
That said, I agree that all 5 are stealing. Humans have created new words and terms for centuries partly to blur lines like these.
Here's a great read about Synantonyms (which is what I'd call harvesting vs. stealing):
http://www.mindreadersdictionary.com/can-i-do-better/is-there-something-to-learn-here/synantonyms/