Wow, have you heard of the free software movement? Please check out the
speeched of Richard Stallman at http://audio-video.gnu.org for some basic
Free Software 101 which I'll try to cover here.
"he doesn't have the rights to those things"
On the contrary: One of the key tenets of the free software movement is that
all software should be free. All as in all. :) So, I must disagree with you -
They do have the right to the source code of all software that they receive
so that they may have control over their computing, which brings up your next
point.
"It was done legally"
It is unfortunate when people use the legal system to deny people their
fundamental rights to have control over their own computing (and when this is
done with the software inside medical devices that go inside your body like
pacemakers and other things then you're being denied even control over your
own body. See the talks that Karen Sandler has given on this topic.)
Nevertheless, the free software movement says that it is wrong when someone
denies someone these essential rights, even if it may be legal. That is what
the movement is fighting for. Software freedom should be included in the
United Nations's list of basic human rights. Let's go for it!
"If we say we have a right to what others, no matter how rich and rude they
may be, have legally reserved to themselves, doesn't that amount to
stealing?"
I am not referring to private copies of software, which people are entitled
to, but only when that software is distributed to others. Once that happens
the software should be free as to to respect the essential rights and
autonomy of those that are receiving those copies.
Also, thinking that it's possible to "steal" software is a very dangerous
line of thinking. See
http://questioncopyright.org/minute_memes/copying_is_not_theft