Yes, there is somebody, though that somebody is the CPU of the PerlMonks webserver. There is not such a plugin system, or public database access to add triggers, etc., to implement some alternative scheme. If it can't be automated, it's a rather... quaint suggestion for a community of programmers.

Also the point isn't to change how others XP is calculated, but to change your own. I thought maybe that was lost somewhere in there, but maybe not.