In United States jurisprudence , there is a distinction between the mere act of linking to someone else's website, and linking to content that is illegal (., gambling illegal in the US) or infringing (., illegal MP3 copies).  Several courts have found that merely linking to someone else's website, even if by bypassing commercial advertising, is not copyright or trademark infringement, regardless of how much someone else might object.    Linking to illegal or infringing content can be sufficiently problematic to give rise to legal liability.    Compare  For a summary of the current status of US copyright law as to hyperlinking, see the discussion regarding the Arriba Soft and Perfect 10 cases .
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