remove user

I sent this to the original question through support, but let me also put my answer here for future reference:

I don't know that there is a perfect way to remove every trace of someone from a wiki - the whole point is that you always know who changed what.

You can start by removing the PBwiki Account from the wiki (go to Settings, then Users, and select "Remove" in the drop-down box next to the email address), and then if they posted their contact information anywhere on the wiki, delete that.

On pages that were edited, you can try copying the information that was added (and anything else that has been added since), pasting it somewhere else so you don't lose it, and deleting the pages in the history until you come to one the person hasn't edited. Then, revert to that page, and paste in the information from earlier so you don't lose content, it just looks like you wrote it all.

If you do this on every page that was edited, you should be able to have the wiki look like that person never was there at all, however, this may take you a long time depending on how much was edited, and there's always the possibility of missing something.