Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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( f ) you will not engage in criminal or tortious activity , including fraud , spamming , spimming , sending of viruses or other harmful files , copyright infringement , patent infringement , or theft of trade secrets or attempt to impersonate another user or person . 

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