I have a little doubt, hope someone could assist me.

I have Zune in my desktop (win 8) and today I have noticed that in my laptop (also win 8) in the "my computer" folder, there was an icon like a (virtual) device named "Zune (my desktop name)".

1- My doubt is, if somebody else would visit me and connect to my network (wireless) and the same icon would appear in their laptop, would they´d be able to click on the icon and open Zune containing my files (thus copying my files to their laptops automatically)

2- the supposed sync would be effective only while connected in my network or in whatever network?