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When I'm looking at the rating list of a particular game, my main interest is to find players/potential opponents, who are still interested in that game. And who 'll maybe accept a game invitation.
I assume that someone, who haven't played at least one game during the recent months, have lost his interest in that (particular type of) game.
Thus I suggest, that inactive players should NOT be listed at the rating list of that particular game by default anymore. (And I appreciate to add a new option / filter criterium "show all users", which includes inactive players.)
In my opion it 'd be useful to define "inactive player" as: Has currently no running game (of that particular type) AND has not finished at least one game (of that particular type) during the last 120 days.