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 . 

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