Wifi HotSpot?

So where do we draw the line? Where does it end? When does it go from a "Wifi Hotspot" to classified theft? Seriously, MB9G5 has secured their Internet connection. Linksys has not. Is this an open invitation to use their Internet connection at will? There are two other computers connected to this same linksys router, Ganymede and Rufus. Neither of them were sharing a printer, and neither of them were sharing important documents. But where do we as society draw the line? Is looking at someone's computer on an insecure network like looking in the window of their house? Or is looking at someone's computer on an insecure network considered breaking and entering? Would this be considered similar to walking into a house that is not locked? There are some issues we need to resolve as more technology comes out that allows us to see deeper into each other's lives. As for this situation and Rufus, I'll just keep this on the downlow. SSHH! I need an Internet connection when I visit my in-laws.