I worked on a similar idea last year. What I did was take urls to content, scrape the content, and pipe it through a machine learning a evaluator to apply various labels and warnings to content. Lastly, add some nice embeddable UI to surface the report.
I got it to a decent state, but didn’t know how to propagate it or inject it into social communities. I wanted people to be able to tag it on Facebook, and it would reply with an informational card with the analysis and summary.