You're running a conference and you receive reports of an attendee having sexually assaulted people. You have 3 choices:
(1) you behave as if you believe the accusation. You make it clear that the alleged assailant is permanently banned.
(2) you behave as if you don't believe the accusation. You make it clear that the alleged assailant is still welcome.
(3) you choose neither, and imply that the alleged assailant is not welcome but do nothing to enforce that
