instagram is an app available on most smartphones. its like a mix of twitter and tumblr. like twitter but you post pics. but below the pic you can write quite a bit. as much as you want. its also used by people in multiple countries btw i think these people are actually in southeast asia. i THINK. its like it doesnt matter whther its validated because people dont care what they post. i cant post it but theres dozens among dozens of teen girls that post them cutting their wrist and take a pic and post it. and also people with anorexia taking pictures of their body.