why can anyone edit an existing meetup event? even if you're not the originator of the event, it seems that you can simply change any detail that you want (hover over the event details and click on "change")... you don't even have to rsvp to the event!! it doesn't show you who created the event, nor does it show you who edited a particular detail! i'm shocked that such a basic privacy concern has not been addressed, unless the site admins have some good reason for it...??