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3. When an issue needs to be addressed, transparently take something "offline" (out of public eye). For example, on social media, if there is a complaint that is worth addressing, respond by saying, "Hi, XX! Let's discuss how we can fix this. We've just sent you a DM for more info."
4. Don't let them see you sweat. If you respond emotionally, it will likely only add fuel to the fire. Be the adults in the room.
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6. Urgent issue or crisis related to comms? Email the contacts listed above, and/or text/whatsapp/call +49 15901910686