Imagine waking up, going to work and realising that according to the computers you were never employed there. You then go and try to buy nachos and moonshine, before realising that you never had a bank account. You check your birth certificate, and realise that not only were you never born, but you were never born an orphan. It also says that you are liked by no one. A bitter, unlikeable loner whose passing shall not be mourned. That's exactly what it says. Very formal, very official. It also says you were adopted, and that that's funny too.
And all because you used a computer at the start of the movie.
The aesop: Technology is evil and we should go burn it all and live in mud huts.
The Net was shown during Hacking is Magic night, and this is basically the whole stream in a nutshell.