Social networking websites typically place the responsibility for intellectual property on the users who post content. This means that users are generally responsible for ensuring that the content they upload does not infringe on others' intellectual property rights, such as copyrights, trademarks, or patents.
However, social networking platforms often have their own terms of service that outline the rights and responsibilities of both the platform and the users. Many platforms include provisions that give them the right to remove infringing content or to disable accounts that repeatedly infringe on others' intellectual property rights.
Additionally, under the Digital Millennium Copyright Act (DMCA) in the United States, social media platforms can limit their liability for user-generated content by following a notice-and-takedown procedure. If a copyright owner notifies the platform of an infringement, the platform must act promptly to remove the infringing material to avoid liability.
Overall, while the primary responsibility for respecting intellectual property resides with the users, social networking websites also have a role in monitoring and addressing violations as outlined in their policies and legal obligations.