Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
except to the extent permitted by law , you may not perform , attempt to perform , or encourage or assist others in performing any of the following while accessing or using the fitbit service : ( 1 ) use , display , mirror , or frame the fitbit service or any individual element within the fitbit service , including the layout and design of any page , without fitbit 's express written consent ; ( 2 ) use fitbit 's name , any fitbit trademark or logo , or any fitbit proprietary information without fitbit 's express written consent ; ( 3 ) access or tamper with non-public areas of the fitbit service , fitbit 's computer systems , or the technical delivery systems of fitbit 's providers ; ( 4 ) test the vulnerability of any fitbit system or breach any security or authentication measures ; ( 5 ) circumvent any technological measure implemented by fitbit or any of fitbit 's providers or any other third party ( including another user ) to protect the fitbit service ; ( 6 ) access the fitbit service or fitbit content through the use of any mechanism other than through the use of an authorized connection , fitbit service , or fitbit api ; or ( 7 ) modify , decompile , disassemble , reverse engineer , tamper with , or otherwise attempt to derive the source code of any software that fitbit provides to you or any other part of the fitbit service . 

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