I don’t know why I didn’t think of this earlier or hear about but you know those sites like The New York Times that force you to login but you gain no benefit by doing so? Well people have registered generic/generic or username/password so you can just tap that in and off you go.
I heard about this on slashdot or metafilter I can’t remember which.
This is the results of a quick survey I’ve done of some major websites to see how far this has gone. My suggestion is to register username/password as username and password if you ever have to register anywhere again (obviously excluding those sites which take credit card details or where registering brings an actual benefit).