Do not know whether we have laws in this country that governs this but the ECT act might have something on it. See in the UK a person was fined for using somebody’s WIFI without the persons permission.
Just had a look at all the WIFI connections available to me from the houses around me in my complex and there is a couple that is open with no security what so ever. How ethical and legal would it be if I just connect to their WIFI and started downloading? With the restricted bandwidth that we have in SA, this can save me a bit of bandwidth for other things. Neighbors, do not worry, I will not steal your bandwidth, but please secure your WIFI routers.