I don't have any right to that when I'm a user. However I run various sites, and know that it is a terrible experience for people coming from Google, so I do no

I don't have any right to that when I'm a user. However I run various sites, and know that it is a terrible experience for people coming from Google, so I do not allow it on my own site. Once users submit their content they lose all rights to having it be modified or removed.