Tracking changes, including page deletes

I am using my pbwiki as a class webpage. I need to be able to keep track of who makes what changes, because I want to be able to grade participation in the wiki, and also keep track of any vandalism.

So there are two problems, one right from the begining. If I invite my students by plugging their email into the invite screen, they get an email that has a link, the link asks them to create a password for their pbwiki account, and then they can add my wiki to their account. The problem is that, now instead of a name, like "Joe Smith", I see in my Users list an email like "jojowikity123@someemail.com".

The second problem is that, when I look at the history for a page, I usually see who edited it (but it seems like a page with one edit doesn't show it), but I can't see who deleted a page. Not too much of a problem since I don't have any students who have the ability to delete pages, but I might have some students become moderators, and then that's something that I'd need. It'd also be nice to see that I've deleted a page anyway, so that I could undelete it later.