http://ddowiki.com/page/Guild_Renown and notice '(LevelMultiplier * AccountMultiplier)'. They may not lose you renown from being inactive but the DO lose you renown from being a part of your account size. And once you pass 100 accounts, the renown decay puts you in the position of having to quest only for renown to even keep up with it.
So kicking them only hurts for 2 weeks. Leaving them there hurts as long as they remain.
To the OP- I would be ok with it if your suggestion was more than cosmetic (and it is since officers can do that already)