The concept that people should just suck it up and take it in the ear that all they ever did, will be forever searchable, is total nonsense in my book. I believe in starting over. Some things need to be remembered about a person and their actions, but not writing a furry novel and then changing their minds.
A few of my recent posts here even talk about how Google is data mining about you and me, and how this is not cool, just like this bot/archiver site you mentioned.
So if you created content and changed it, and wanted to now publish $ a new work based on that old work, and some jerk is posting the old stuff potentially as their own or without reference, yeah that stinks. Makes it foggy who wrote what, and when, thus no one will publish that for money if they can't prove who owns it. I guess next time if you have a novel you think will make coin, go straight to a publisher and tell them NO ONE has seen it except them.
The idea that "if you don't want it stolen, don't post it" is a voice from the type of people who are potentially rather young, have nothing , thus nothing to lose, and think sharing ideas and such with everyone all the time is okay. IMHO these people do not yet have to fight for a bite to eat, fight to find a place to live, nor fight to plainly stay alive and build a retirement. Most people I have run into who think share and share alike for absolutely everything are people who, again, have absolutely nothing, do not do something original and take pride in it, or are totally taken care of by others and do not have a clue. You probably worked hard at your novel, take pride in it, and wanted to share what you wanted to share, you wanted the control over your creation, and some jerk is taking that away. I do not like that.