Bad news: you don’t have to be stupid and post nekkid pictures to have this kind of trouble. All you have to do is have a perfectly normal, decent picture of yourself get into the hands of a vengeful person. With Photoshop and other programs, it’s the work of two minutes for him to swap your head onto the body of a porn actress.
A friend of mine had a fully-clad photo taken of her in youth with her cousin. The print was scanned by her brother and uploaded onto his (perfectly normal, non-sexy) FB page. From there, bad guys in a foreign country stole the image, put it in an image database, and sold it to a company that wanted a generic picture of a healthy American girl to market their fraudulent diet drink. There’s nothing she can do. This was an innocent picture taken 25 years ago and she didn’t even post it on her own Facebook page.
Things are getting ugly.
Except none of these were photoshopped. These women took nude and semi-nude self-portraits for the pleasure of their boyfriends, which wound up online when the relationships soured.