"It is available publicly *under some conditions* which are expressed
by the GPL in this case."
Correct. Which is only possible because we are bound by copyright law,
a meta-contract, if you wish.
"Go to whatever shop. Everything displayed there is 'available'
and was made before any particular customer asked for it. That
doesn't mean you are allowed to take it away for free, not even
if you could do that very easily."
Absolutely correct line of reasoning when it comes to physical scarce
objects.
Now, imagine that all of those things can be copied at no cost whatsoever
and that they are available everywhere, even outside the shop. Would you
agree that in such a case the situation is different and deserves a
different
line of reasoning?
--
Louigi Verona
http://www.louigiverona.ru/