http://www.bbc.co.uk/news/technology-40382877

I've never understood why you cannot often change the username on routers.
If both the password & username were initially random out of the box and both were changeable they would be a lot harder to crack.
The default password on the Virgin router I had was 'changeme' with a basic 6 or 8 digit username. Which no doubt was part of a simple algorithm as opposes to being randomly generated