One of the biggest problems on Tumblr is hate groups. Ex. Anti-Regression, Anto-kink, Anti-cg/l, Anti-cglre, Anti-bdsm, racism groups, Anti- LGBTQ+ etc. Many of them spread hate in tags meant for the group they're hating on, harrass members of the group, send gore and death threats. Tumblr needs to ban hate groups from their website (specifically) because they don't seem to get rid of the blogs that are a danger to others (I'm sure that the Tumblr Staff tries to help)