This might have been on HN a while ago, but it talks about different social media sites and came to the conclusion that Instagram was the worst of them as far as this stuff goes.

https://www.rsph.org.uk/about-us/news/instagram-ranked-worst...

I'm not able to open the report itself from that page, but I found a copy and uploaded it to archive.org.

https://web.archive.org/web/20180128204404/http://www.infoco...