I just restored a page recently on a really nice
GTD wiki, related to
time management/productivity software....and had to do it again just now as I was making this post.
Someone had wiped out the entire page and replaced it with a few spam links.
Luckily, it was fairly easy for any visitor (like me) to find and restore the previous last spam free version. Unfortunately, it's just as easy for the spammers to wipe it out again & again.
I am just getting tired of having to do it. It seems like I should bookmark the page with the last good version and write a script that will automate the checking of the page every hour, identifying when it has been wiped out, and automatically restoring that last good version.