I suppose I'm a victim of fishing. Someone wrote to me demanding for money - otherwise they will send some of my naked photos to my friends. I realize they are just duping me, I've found a lot of very useful information as https://www.safetydetective.com/blog/what-is-phishing-and-how-to-protect-against-it/ (I greatly recommend this author -simple and easy style) but can they do any harm to me if I'll just ignore these emails?