Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
2.4 user verification on the internet is difficult and we do not assume any responsibility for the confirmation of any member 's identity . 

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