I think this is an important point. You could use the internet as a media for instant communication for a long time, but only recently has it been integrated significantly into mobile devices. Which is why social media (and also Instant Messaging, for that matter) has become a simple way to call for help in emergency situations. This makes an online emergency service a good idea (cut out the middleman). It also means parents will have to start teaching their kids how to call for help through the internet.