Hmmm...actually the most clearly unethical act was not the low ball offer, the deadlines, or the non-disclosure request--it was the repeated insistence by "Peter" that "the decision reached in this case is final, and cannot be overturned" which is a blatant lie.

The Airbnb Host Guarantee clearly lays out an arbitration process in case of any dispute.

https://www.airbnb.com/terms/host_guarantee

General. You and Airbnb agree that any dispute, claim or controversy arising out of or relating to these Airbnb Host Guarantee Terms or the breach, termination, enforcement, interpretation or validity thereof, or to the use of the Services or use of the Site or Application (collectively, “Disputes”) will be settled by binding arbitration. You acknowledge and agree that you and Airbnb are each waiving the right to a trial by jury or to participate as a plaintiff or class member in any purported class action lawsuit, class-wide arbitration, private attorney-general action, or any other representative proceeding. Further, unless both you and Airbnb otherwise agree in writing, the arbitrator may not consolidate more than one person’s claims, and may not otherwise preside over any form of any class or representative proceeding. If this specific paragraph is held unenforceable, then the entirety of this “Dispute Resolution” section will be deemed void. Except as provided in the preceding sentence, this “Dispute Resolution” section will survive any termination of these Airbnb Host Guarantee Terms.

Arbitration Rules and Governing Law. This agreement to arbitrate evidences a transaction in interstate commerce, and thus the Federal Arbitration Act governs the interpretation and enforcement of this provision. The arbitration will be administered by the American Arbitration Association (“AAA”) in accordance with the Consumer Arbitration Rules (the “AAA Rules”) then in effect, except as modified by this “Dispute Resolution” section. (The AAA Rules are available at http://www.adr.org or by calling the AAA at +1 800 778 7879.) The Federal Arbitration Act will govern the interpretation and enforcement of this Section.

Arbitration Process. A party who desires to initiate arbitration must provide the other party with a written Demand for Arbitration as specified in the AAA Rules. (The AAA provides a form Demand for Arbitration. https://www.adr.org/cs/idcplg?IdcService=GET_FILE&dDocName=A... ) The arbitrator will be either a retired judge or an attorney licensed to practice law in the state of California and will be selected by the parties from the AAA’s roster of consumer dispute arbitrators. If the parties are unable to agree upon an arbitrator within seven (7) days of delivery of the Demand for Arbitration, then the AAA will appoint the arbitrator in accordance with the AAA Rules.

Arbitration Location and Procedure. Unless you and Airbnb otherwise agree, the arbitration will be conducted in the county where you reside. If your claim does not exceed $10,000, then the arbitration will be conducted solely on the basis of documents you and Airbnb submit to the arbitrator, unless you request a hearing or the arbitrator determines that a hearing is necessary. If your claim exceeds $10,000, your right to a hearing will be determined by the AAA Rules. Subject to the AAA Rules, the arbitrator will have the discretion to direct a reasonable exchange of information by the parties, consistent with the expedited nature of the arbitration.

Arbitrator’s Decision. The arbitrator will render an award within the time frame specified in the AAA Rules. The arbitrator’s decision will include the essential findings and conclusions upon which the arbitrator based the award. Judgment on the arbitration award may be entered in any court having jurisdiction thereof. The arbitrator’s award damages must be consistent with the terms of the “Disclaimers and Limitations of Liability” section above as to the types and the amounts of damages for which a party may be held liable. The arbitrator may award declaratory or injunctive relief only in favor of the claimant and only to the extent necessary to provide relief warranted by the claimant’s individual claim. If you prevail in arbitration you will be entitled to an award of attorneys’ fees and expenses, to the extent provided under applicable law. Airbnb will not seek, and hereby waives all rights it may have under applicable law to recover, attorneys’ fees and expenses if it prevails in arbitration.

Arbitration Fees. Your responsibility to pay any AAA filing, administrative and arbitrator fees will be solely as set forth in the AAA Rules. However, if your claim for damages does not exceed $75,000, Airbnb will pay all such fees unless the arbitrator finds that either the substance of your claim or the relief sought in your Demand for Arbitration was frivolous or was brought for an improper purpose (as measured by the standards set forth in Federal Rule of Civil Procedure 11(b)).