Ask HN: Any recommendations for keeping the trolls out?

I have been working on a project for some time to help people with PTSD keyword tag media (books, movies, TV shows, podcasts, etc.) with triggers, in order to help others strategize about their consumption (skipping that episode and reading the synopsis on a wiki, etc.).

Obviously something like this will attract trolls, who could do some real damage with a platform like this.

Does anyone know of any good libraries/utilities (preferably Node.js) to assist in such a thing? Or even just concepts/advice?