How to maintain your Internet Identity even when you're dead

Those in the cosplay community already know this "Heather Mikayle" character trending in the internet as the infamous impostor of Saya, the famous cosplayer who was reported to have died recently, according to her FB fan page.  Identity theft in the internet is nothing new because anyone can just log in and give themselves an identity, even if someone else already owned it.

But I wont be talking about Heather, there are enough blogs by everyone, including established news networks, to read and discuss about (Google it if you really want to know more).  Right now I'm actually fascinated about one thing: how to make sure people wont steal your identity, even when you're dead.  I've thought about a few things, based on experience and some forward thinking, and other than trying to be famous or infamous.  I'll try to sum it up as simple and short as possible.