The reason I bring this up is because LiveJournal has a bunch of closed communities dedicated to user icon-making, graphics, etc. They are application / invitation only (where people comment to an "application" post with samples of their work, so we can determine their worthiness into our elite clique :-P). Because of this, we obviously don't want people to be constantly requesting membership to our groups, since we want to control who gets in.
There are many communities out there who are going to have to deal with annoying/stupid people who simply don't understand why we've chosen to close the community, in addition to the usual: "wHy w0n't u aCc3pt me?? i rEqUeStEd 57 tIme5 alRe@dy!!!111!!1". Now, in addition to receiving annoying comments, we're going to have to deal with having to physically deny people who never applied to join, who we never invited to join, and who keep trying to join despite our efforts to make them get the point that "Sorry, you weren't accepted."
It's going to create all sorts of aggravation for people who want to run closed communities and don't want -- or have time -- to deal with the possible annoyances of this new "feature."
Please reconsider going back to the old system. Thanks.