I know I'm really out of date here - but please bear with me. Going back just five years or so all the advice I read said to have a strong WiFi password and never give it out to anyone. Now people seem to give it out their WiFi password to all and sundry who visit their homes so they can use the home WiFi network on their mobile devices. So what's changed. Was the advice before over cautious? Or has convenience just trumped security?