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