Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
we do not , and can not , pre-screen or monitor all user content . 

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