Electronics360: "Power over Ethernet explained"

I do have big problems getting our home designed board up running and been a lot of datasheets through.
Why on a site like this which I believed to be proff do I see a drawing that is not even close to the truth and looks more from a children book ?
When seeing this how can one trust the text is more correct.

If you provide the CR4 forum with some information, more detailed than ‘big problems’, regarding the issues you are experiencing, perhaps some constructive advice will be offered.

As you say, the text and illustration in the article are not likely to be a panacea (fix every problem for every reader), and so the CR4 discussion forum is sponsored by GlobalSpec to assist with specific issues.