John, thanks for the email. I know Andre Klapper has put "figure out whether and how we want to deal with votes in Bugzilla" on the long-term list of things people ought to do. See https://www.mediawiki.org/wiki/Bug_management/Task_list#Tasks_that_require_s... and look at the third top-level bullet: "Voting in Bugzilla: Some products support it, some don't." (That section has some ideas and links.)
Andre will probably reply onlist once he gets in Monday morning Prague time, but I just figured I'd mention this quickly.