Chris, this request is already on the wish list. It is a feature we've had for as long as I can remember on Yahoo Groups. If Mark can add a "mandatory" option, then, folks can either require a comment, or not. For my groups back on Yahoo Groups, our group description stated that a membership request must have a comment included that relates to the purpose function of our group. If someone tried to submit a "filler" comment, like "hi", their request was rejected. Worked fine for years on Yahoo Groups, don't see why this would have a "real problem". In fact, Mark can even make a comments section visible or hidden for list mods/owners if he wished.