If I choose a different pen name, rename my characters (a process that I dread), rename all of my locations, and change my titles, this information shouldn't be easily found. However, I've decided on names that I like and they are distinctive enough that they pop to the top on an internet search. Part of the disadvantages of trying to write fantasy.
Three words, Linda. I can find my forum in three words.
And I don't that public forums are an upside. Your example had his information stolen because of a public forum, requiring massive time and emotional wear-and-tear as he fought to benefit from his ideas. The stored archived and timed information let him win the case, but if it hadn't been public, the whole thing wouldn't have happened. He might have won money for his effort, but how much of it went to lawyers? Will he ever have a career in Hollywood for writing this blockbuster?
Our site is dark now. I can google those same words, and get the same hit to my info popping up at the top. However, the site blocks access now because it is private and requires a password.
I don't find your suggestion helpful of doing plot specific conversations over private messaging. How can you have a forum and not talk about plot? I've found a writers group here. A real group. They know my work and keep track of continuity. This is in large part because we aren't passing notes back and forth under the table. Instead, my experience is like talking over a table with a group of friends. There aren't a whole lot of barriers and we can speak what is on our mind.
And here is an example where things could get uncomfortable for the writer who is 'exposed' by a casual google that reaches the forum. Think of the Romance group, where anatomical questions are debated and sexual positions are discussed. One of our members is in this group. I googled the name of her characters and the title. Boom. Right at the top of a search. Then I added the search word: Romance. That got me to the Romance page. A quick link got me to the forum list of conversations and straight to the 'adult content' link. Five clicks and I was reading up on p***s sizes. This was done while I was NOT signed in, yet I had full access to this forum.
That much access is inappropriate. If our writing is protected by TNBW, then the forums can be protected. Note that my search didn't reveal my books or the text involved. It also didn't reveal the old information from the forums that Sol took down on the old site.
I discussed deleting the site entirely and starting fresh so that the material wasn't so easy to find. Instead, we're going dark. That will continue until this problem is resolved. I'm doing it to protect friends. I'm also protecting their time and life's work. They have reason to be proud of what they are creating.
A