Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
( iii ) violate the restrictions in any robot exclusion headers on this website or bypass or circumvent other measures employed to prevent or limit access to this website ; 

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