This cuts against the nature of real life. I regularly speak with groups of high school pupils about privacy and one of my main points to them is that once the

This cuts against the nature of real life. I regularly speak with groups of high school pupils about privacy and one of my main points to them is that once they commit their latest brain-fart to the internet, there is a very real chance that it becomes immutable - should it go viral, for instance. If it were absolutely guaranteed that it would become immutable though, that would be a game changer. Can you imagine if everything that you had ever said at any point in your life was permanently journaled and indexed and searchable? I personally find that to be a horrific concept from a privacy point of view. From a purely technical point of view I can see the benefit of this idea - I hate it when an old article that I've bookmarked doesn't exist anymore (even when by article I mean, a gif that made me chuckle) but seriously, there's a very different world to a newspaper article being permanently available and a myspace profile, Facebook post or tweet being there forever.