I suspect one of the main features of an avowed unsocial site is that you can be certain you're not going to accidentally fatfinger/misclick and share something you really didn't want to with (some of) your social network.
The consequences of such actions are ever increasing as more people connect with more and more people, widening the visibility of any gaffe, and making recovery more difficult.
Those people with genuinely serious "something to hide" probably wouldn't be using a cloud-store anyway, especially not one that archives the content as well, but miscommunications happen all the time.
Try explaining to your grandmother that you were actually reading up on some bizarre sexual fetishes as part of an anthropology paper.
The consequences of such actions are ever increasing as more people connect with more and more people, widening the visibility of any gaffe, and making recovery more difficult.
Those people with genuinely serious "something to hide" probably wouldn't be using a cloud-store anyway, especially not one that archives the content as well, but miscommunications happen all the time.
Try explaining to your grandmother that you were actually reading up on some bizarre sexual fetishes as part of an anthropology paper.