Breaking Codes (WEP or else ) is in principle not allowed, but Judges will only punish if any damage was caused. The last also applies to using open connections: You are allowed to use Open APs, (on terraces for example: Cafés install Routers for that purpose) However you are not allowed Wi-Fi-ing along with your neighbour (or your boss) to save your money. You will certainly be punished if you upload bad content using someone else's (router) IP.