I think a point of contention over the unmoderated aspect is that compared to it's sister site 4chan which will actively coordinate with authorities and temporarily take the site down whenever evidence is being collected, 8chan appears to treat the authorities with contempt to the point of needing a search warrant. It's creator Fredrick calling for the site's shutdown was the killing strike in my opinion, though the site had /g/ establish a full Tor infrastructure years ago so it's not going to really truly die anytime soon
Speaking of 4chan if I was Hiro right now I would be batting down the hatches and moving most of the moderation force to the problem boards to snipe any incoherent manifestos until this all blows over.