If you've ever experienced the awfulness of a friend or relative passing away, yet their Facebook or Twitter account remaining online because there's no way of shutting it down, then a social media will might sound like a good idea to you.

All sorts of questions regarding the compromising of privacy, encouraging hacking and so on are raised should you ever share your log-in details with someone else.  But how else to deal with the possibility of years after your best friend died young, Facebook is still sending you alerts about his or her birthday, for example?