Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
vimeo may block your email address and internet protocol address to prevent further registration . 

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