Training modules/Dealing with online harassment/slides/how-to-request-takedown-of-content-on-other-social-media/en

Off-wiki harassment: How to request takedown of content on other social media
Most social media websites (for instance, Reddit) have, for their own legal protection, explicit policies about when and how they will remove ("takedown") content that infringes their terms of use or violates the law. Similarly, they will usually have guidelines that determine whether certain behavior or content is desirable.

Where harassment is taking place on external websites, it can be possible to request intervention from these websites themselves. Many of the major social media networks now have Trust and Safety teams, though the existence of and best practices for these teams are often quite new. As a result, many of these teams are still trying to firm up policies and procedures for dealing with cases, and may not have a definite, immediate response to give to a complaint. That having been said, most trust & safety teams care about protecting their users and are receptive to complaints about these issues.

Some websites have streamlined the process of requesting content be taken down; for instance, Facebook allows users to report problematic content of many types with a button and Twitter accepts reports of copyright violations via an online form.