My fiance and I are toying with different ways to send out invitations. We're very budget and environmentally conscious. We don't want to do traditional invitations with all the extra inserts. Is it inappropriate to request RSVP's via e-mail? We cannot come up with one potential guest who does not have an e-mail address. Even our grandparents have e-mail addresses! However, certain people in our families/wedding party think this is tacky. We're a very laid back couple and I am not the type of bride who is overly concerned with playing by 'traditional wedding rules'. We don't want to seem disrespectful but we want to plan the wedding our way. Any advice? Thanks!