“Social media” is not a person, so no.
People using so-called “social media” apps or web sites or whatever have a reasonable expectation that everything they see may be nonsense, and that if it’s publicly available and disturbing, that word it going to get around, so no.
People with conscience seeing something they believe and are disturbed about and think there is something to report to someone, will tend to do so. So don’t worry, someone will probably already have reported it, so no you don’t need to feel the need to.
People who run & moderate social media sites also have more responsibility for the content then the users, so no.
And if most people who saw disturbing things on the Internet reported it, the emergency reporting channels would be swamped to the point of uselessness, so NO!