Can you see the source for Windows?
never heard of windows transmitting user data you can identified with? especially winxp when using windows update service
why you cant see mircs source is because it is written in a programming languange, not a script language
and of course there commercial interests to hide sources
but if you want to hide code you are not intended to sell, than it looks strange
the only reason scripts containing trojans are not hidden is because it is not easy to do so, if possible at all