Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
however , if nintendo becomes aware of possibly unlawful or inappropriate user-generated content , ncl reserves the right to delete or to block access to such user-generated content at its own discretion . 

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