A person might join a site to look at pictures of her nephew and five years later believe in a flat earth.
Social media pulls people in with this dream of bringing people together and staying in touch with people we cherish. While it is an undeniable that it has stayed true to it's promise, a lot of us are susceptible to buying into mob mentality, no matter how baseless the claims may seem. This, I believe, happens because just as social media brings us all together it is very easy to alienate people of other groups and form a polarized society. Like, how someone may like one flat earth post and is then bombarded by hundreds of them to the point where it seems to be the absolute reality. Another example of such would be the amplification of unrealistic body standards and it's severe effects on young teens.