[{'role': 'user', 'content': 'Analyze the following clause from a privacy policy and determine if it\'s fair or unfair. Also identify any privacy practices mentioned: Blocking other users. You have the ability to add any user to your "blocklist" at any time by clicking on the "block" button on that user\'s profile. This will prevent the user from asking you a question.'}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]