Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you and airbnb acknowledge and agree that we are each waiving the right 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 as to all disputes . 

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