Picture Of Your Period How Is Posting Your Picture On The Internet Any Different Than Walking In Public?

How is posting your picture on the internet any different than walking in public? - picture of your period

I do not understand. People say that you NEVER send your photo on the Internet.

But what if I send her photos online, and no personal information about you. Would it not show the same as walking into his face to the public? I refer to these people can see what is displayed, can the same people who follow you, then how is it more dangerous?