I know, I know, you're probably thinking CC0 or WTFPL or something along those lines. But the thing is, the way I see it, people have a right to redistribute anything, even if the author doesn't want them to and didn't release it under a free license; once someone receives it from the author it is no longer any of the author's business what they do with it. (Yes, I'm aware the law says otherwise; I believe the law is wrong.)
My reasoning behind this is unimportant to the question, but for anyone wondering, it basically boils down to the technical nature of the act of conveying a copyrighted work: you're really doing nothing more than altering the state of a physical object you own and then giving it to the recipient, or alternatively altering the state of something that the recipient already owns in the same way. You have a right to modify your own property however you want, and you have a right to give your property to whoever wants it. And anyone can grant you permission to modify their property, at which point you have a right to do it without needing anyone else's permission.
Because of all this, bringing copyright infringement claims against a license violator in court would constitute inciting an initiation of force against them. According to the non-aggression principle (a libertarian idea I strongly believe in) this is not acceptable. So if I license something under CC0, and distribute it to person A, who then in turn distributes it to person B, it's possible that, according to the law, person B won't have a right to further distribute it, and person A will have the right to bring charges against B for doing so.
I don't want this possibility. I want to use my copyright protection as an opportunity to, wherever I can, have the law reflect the rights I feel people actually have. This, I believe, is the point of a copyleft license, which is why I've mostly been using the GPL for my code. But today I realized that this is not sufficient, as it obligates distribution of source code along with binaries. I'd rather people distribute source code, but they have a right to give me the binaries whether they want to distribute code or not.
Essentially, I'd want my license to work as if copyright didn't exist. A license that permits everything except legal action of any kind, even on derivative works. I want to ensure people's freedom not just in the way people can use public domain stuff, but I want to enable anyone to do anything with my work, and any other work the law gives me say over. One way to put it is that the only restrictions I want on the license would be restrictions on copyright law, not on any end users or distributors. So, just like if copyright law didn't exist:
Anyone may use the software for any purpose they choose, and distribute it in any form and for any purpose—if someone could do it without the existence of copyright law, they can do it with my software.
However, no one may place any type of restrictions on my software, nor any software the law grants me authority to decide this for, under copyright law, except for that one. Which isn't so much a copyright restriction so much as a restriction on copyright, because it doesn't prohibit anything that would be allowed if copyright law didn't exist—the law wouldn't allow the use of force for things like this, much less provide an official means of doing so. This would only exist as a license restriction because, ironically, it's the only way to ensure real license restrictions don't become a thing.
An important distinction is that this only applies to legal restrictions, ones that rely on force. Although I strongly dislike DRM, for instance, I still want to ensure the freedom to redistribute the work in any form, including encumbered by DRM. Again, that would be possible and permissible even if it wasn't for copyright law, so it's okay here too. However, if that's what you want, it's on you to make it strong, because if someone manages to crack it, it's entirely your problem; you won't be able to sue anyone for distributing cracked copies, nor take advantage of anti-circumvention laws. Similarly, software released without source code can be freely reverse-engineered and shared in recreated source code form, if anyone desires to do so.
tl;dr: I don't like copyright law. I want to use a license that allows maximum freedom, except freedom to enforce copyright, same as if copyright didn't exist. Basically, you can do anything you want, but so can anyone else, so you're on your own if you don't want them to.
The license applies to whatever I can make it apply to, and the only way to violate it is if you initiate legal processes.
Is there a license like this or would I need to find a lawyer to write a custom one? (I wonder if the EFF or someone would do that pro bono.)