I totally agree that some people can become over medicated and sometimes be miss diagnosed. However, if you have concerns regarding these things based on this article then in my own opinion I would do somemore research on this topic.
It states "Patients are currently diagnosed on the basis of a constellation of symptoms that include sadness, fatigue, insomnia and suicidal thoughts. The diagnostic manual used by psychiatrists says that anyone who suffers from at least five such symptoms for as little as two weeks may be clinically depressed. Only in the case of someone grieving over the death of a loved one is it normal for symptoms to last as long as two months, the manual says." Any good resource on depression would tell you that the "manual" used is actually the DSM IV, the Diagnostic and Statistical Manual of Mental Disorders. Also, it seems they are discussing situational depression and saying that doctors measure all depressive symptoms on the same scale which is not true. There are over 14 differant diagnosic criteria that someone can present with depression. Here is a link so you can see what differant things psychiatrists look for when diagnosing depression. http://allpsych.com/disorders/disorders_alpha.html
Yeah there are a lot of doctors who prescribe antidepressants when someone comes in and states their symptoms. It is always up to the person if they are going to take them or not or if it is the right treatment for them. Everyone is differant and it is so hard to gauge this. One thing I can say without a doubt is that any depression symptoms left untreated is extremely dangerous to that person.