i would be especially interested in the reasons you pretend to have for such a funny idea.

Not to answer for the OP, but I have a module that traverses namespaces wrapping all functions in a closure. This is equivalent to the problem above, though the intention is not to redefine constants.

it is not by accident, that there exists a difference between a constant and a variable

No, but it is an arbitrary implementation detail that constants would be functions that rely on folding in the parser.