Just tell your friends that all signups are approved automatically, and simply ignore that field.
Confirmation is used where some kind of fixed setup is needed (eg. 2 tanks, 3 healers, etc.), and raid leader can choose who will be in the team and who is not needed for that event.
I really don’t see the difference between auto approve and ignoration of that field.
adding the
#rp_event_attendants table tr th:nth-child(4),
#rp_event_attendants table tr td:nth-child(4) {
display: none;
}
to you css file will hide that column.