a) SPV clients have copy of all block headers
Yes, and that doesn't prevent the MITM attack that I mentioned.
b) there is no such thing as "balances" at an address. Bitcoin works on the concept of inputs and outputs.
What language do you speak then? Special forum language?
Here is an address:
18uvwkMJsg9cxFEd1QDFgQpoeXWmmSnqSsClick on that link and you will see on the resulting page a label that says
Final Balance, indicating what I think is a "balance", at an "address".
d) "The transactions containing them can simply be moved automatically according to some strict rules that I don't care enough to come up with" That is why you have no proposal. "Um yeah we can do this stuff but it will require some stuff but I don't really fill like saying the stuff but if you don't agree with me you are jerks and just trolling. We can fill in the stuff later and stuff."
... Maybe I will take the time, or maybe I won't. It doesn't much matter in the end does it? If you don't see the potential usefulness of the idea at this point, I don't think you'll see it even if I write the code for it, so why waste my time?