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ST's initiative was geared at editor retention, the way I see it. As he mentioned on his Talk page, he prefers facilitating collaboration than meting out discipline.
Unfortunately, there are problems with COI on Wikipedia, etc, and these issues are not all amenable to touchy-feely solutions. 
Although I haven't broached the possibility before, this case provides the opportunity for a hypothetical scenario. Supposing that the Koch brothers, to whommoney is no object, have some funds allocated in their PR efforts that include Wikipedia. Well, such editors are not going to be amenable to reason, because they would be being paid not to be reasonable. 
That is simply a hypothetical case that makes it clear that Wikipedia has to have strictly enforced sourcing policies, otherwise even an Arbcom police state will fail. 連絡 見学/迷惑 "