Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you will not remove , alter or obscure any copyright , trademark , service mark or other proprietary rights notices incorporated in or accompanying the services . 

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