Thanks for all the comments everyone!
Just to clarify, I get the concern about the conflict of interest, I was just taking it to the extreme in thinking that one might be biased favorably toward someone who received their PhD from the same institution, or even had the same advisor. Also, I interpreted "from" as being where someone's PhD was from. (wonder if I could get them to edit that to "at"... :P
No point in trying to track where people got their Ph.D.s.
makes sense. It would be a bit of hassle for the journal editors to try to figure out that kind of info just for reviewers.
Thanks again, this is the first time I've posted here, I may be making a habit of it. :)