Re-using copyrighted code

[Michael Torrie]

On 06/09/2013 02:32 PM, Mark Janssen wrote:
> PyPi.  But if you are *publishing*, there's no court which can 
> protect your IP afterwards from redistribution, unless you
> explicitly *restrict* it.

I am not a lawyer, and I haven't read the copyright act in its entirety,
nor have I studied all the case law surrounding copyright, but your
statement is exactly backwards of anything I've ever read on US copyright.

What relevant case law supports this view?  It's a very interesting
opinion.