Tobacco is a natural leaf that became a mass killer because it was packaged in small, easy to consume units that provided an instant dopamine hit, then relentlessly marketed. I feel it is an extremely good analogy to the current crop of 'social' startups.
Businesses exist in order to make profits for their shareholders; The benefit they provide for their customers or society is merely a happy coincidence. Until the Pure Food and Drug Act, most medicines did more harm than good. Asbestos was incredibly profitable for a great many businesses. I have every right to criticise a business if I believe their product is harmful, regardless of how popular or successful that business might be. To do so does not make me judgemental or immature, but simply an engaged citizen. The belief that all successful products are socially beneficial is clearly absurd.