Right now, I think that we should assume that most people value their privacy, and unless they have actively given consent for a nude image we should delete it to protect their right to privacy, and the right to control the way that their photograph is used.
Sydney
User:FloNight
Yes, the rule should be that personally identifying images should be routinely suppressed in the absence of permission from an identifiable person who has signed an informed release. An informed release would include a declaration that they understand how open source image licensing works.
There are privacy issues. Can a person remain anonymous and release an image of themselves. If so, how, in the case of Commons or Wikipedia?
We routinely use the oversight tool on the English Wikipedia to suppress phone numbers and home addresses as releases of personal information.
Fred
If a person is identifiable to their social set, family, or even to just themselves, permission should be required if there is sexual or sexually suggestive content.
Fred