They did ban r/ intcel, coontown, frenworld, fatpeoplehate, gendercritical, chapostraphouse, braincels, and various others. "the donald" was initially quarantined in 2019 and banned in 2020. By then they'd already let the scum who ran and frequented the sub run rampant over the site for way too long.

I recall around 2017, various left-leaning subs started automatically banning anyone who participated in what they called hate subs. That was annoying because even if you went in t_d and said "wow, you guys are losers", you'd get banned from other subs by a bot.