Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
further , unless you and airbnb both otherwise agree in writing , the arbitrator may not consolidate more than one party 's claims and may not otherwise preside over any form of any class or representative proceeding . 

```
. OPTIONS: ["Jurisdiction", "Contract by using", "Limitation of liability", "Arbitration", "Unilateral termination", "Unilateral change", "Content removal", "Choice of law", "None"].