Sort Users on a server by activity

Fair simple- on large servers (50+ people), there may be many users who rarely talk, and some who are well known staples of the server. while you could give the most active people a separate role, it's a workaround. just let a server operator have a setting to sort members, on the sidebar, by number of messages, or wordcount, or something. that way I can immediately see the activity status of people I most care about.