The handling of this situation underscores the need for establishing at least the following:

• a community code of conduct, to provide guidance and establish boundaries for safe and productive coordination,
• tighter sponsorship guidelines for (quasi?) official events, to help clarify accountability in these cases,
• clarification of what constitutes an official event (in my opinion, only explicitly-Foundation-organized events should carry the "official" status, with the relevant communications coming from individuals explicitly acting as representatives of the Foundation),
• better practices around public-facing messaging in general (I understand everyone is very busy with last-minute preparations, but we still have not seen a statement about how and why the decision was made to accept this sponsorship, nor its reversal),
• community moderators who carry responsibility for ensuring the code of conduct is adhered to, and who are publicly accountable for any actions taken (some of this responsibility is already held by the Moderation Team, but my intention here is to further distribute that burden to community members whose only job is this, and who do not also hold high-profile maintainer positions on other teams; these folks tend to be too busy to actively and consistently participate in faster-paced contexts like Discourse threads or in the many unofficial channels)