[smachiz]

The article you cited does not agree with your assertions. It specifically tells you how and when to evaluate the use of an anonymous source.

If you don't ever use anonymous sources, many fewer people will talk to you. Being on the record about something that will get you fired, will get you fired - and then no one talks to journalists.

What separates actual ethical journalists from the rest is doing everything the article you cited suggests - validating information with alternative sources, understanding motives, etc.

[mcny]

You don't have to use every single source you talk to in your article though. Sure, I will grant my neighbor's dog anonymity but I won't include his opinion in my article at all.