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