Sure a public figure can be anonymous - - The Son of Sam was anonymous for a long time but also a public figure.
Same thing with the Zodiac Killer - - still unidentified, but we all know what he did.
How about "Deep Throat" in the Watergate scandal?
MW or Bridget or Nancy Krebs - - it doesn't matter, she went public with accusations and a story that was big news. Thousands of pages about her on the Internet. Stories in the papers. Press release as well.
I think she would be hard pressed to remain a private figure if it went to court - - not because she went to the cops, but because she went to Mame, because her lawyer went to the media.
If I am wrong, perhaps Lee Hill will let me know why.