Let's talk GPL, I may do with it whichever I like as long as I do not distribute it... which part exactly did you not understand?
Developers, odd as it may seem, sometimes give source code but retain ownership.
Which odd as it may seem I never questioned about.
Yes. That's a serious qualifier to the above statement, isn't it? Your argument jumps like a lion but lands like a mouse. You are living in a country that has signed up to the WIPO treaties (World Intellectual Property Organization) and the Bern convention. That means you can expect that your copyright is respected and are required to respect others' copyright. Copyright places all rights, including the right to modify and distribute, with the creator. The license is the bit in which the copyright holder relinquishes some (or all) of these rights, so you better respect that part, it has been written for you benefit.
We don't live in a lawless state, nor do laws came out of random, as such you cannot have a copyright statement where it says for example:
You can only use this software if you stand only by one foot. I was not talking in taking the place of copyright from anyone, just that what he can or cannot do is already covered, it's not as if he possess all that freedom of which you talk about, it's was opened, as such he got proof of the copyright of what was written, the rest is out of his control...