ak.ari.lt has blocked the following instances:

pawoo.net for "[FediNuke] Lolisho instance that does not moderate sufficiently. Has had several incidents of actual CSAM and child predators going unmoderated for long durations, despite reports."
mstdn.jp for "Openly hosting CSAM."
13bells.com for "[FediNuke] Admin posts Sandy Hook school shooting conspiracy theories, transphobia, and queerphobia."
1611.social for "[FediNuke] antisemitism from admin, anti-vax from admin with other local members, antisemitic caricature from admin."
4aem.com for "[FediNuke] Freeze peach PeerTube instance on the “tube” subdomain, hosting blatant antisemitic content. “Clown World” dogwhistles, antisemitic “Why Kanye West is right”."
5dollah.click for "[FediNuke] Blatantly racist use of slurs from staff account, more racism from same account. The other staff account is racist too. Extreme racism from staff. “About” page lists no rules."
adachi.party for "[FediNuke] The instance in question is on the “pleroma” subdomain. Its “about” page has the “Kill, behead, roundhouse kick” copypasta with racial slurs. Archived “about” page. Later updated rules to include “must advocate for racism/fascism/nazism”. Admin posts racist transphobia, mass-tags other users with blatant racism."
adtension.com for "[FediNuke] Admin posts blatant anti-Black racism, and doubles-down with more after being called out on it."
dembased.xyz for "[FediNuke] #FediBlock on 2023-02-24 Hosts a blockbot user, with the handle “blockbot”, and a defederation-notification bot. Racism from admin. In light of this, I’m not inclined to give the benefit of doubt over the cross in his display name and doubling down on vaguely antisemitic posts. Another example of antisemitic caricatures from the admin. Blatant antisemitism from local user. dembased.xyz used to run the pre[…]"
anon-kenkai.net for "[FediNuke] Blatant antisemitic caricature on the landing page of its “peertube” subdomain. Admin on the “mitra” subdomain posts anti-pride messages."
asbestos.cafe for "[FediNuke] Racism and ableism from admin. Admin sharing a dox attempt Transmedical gatekeeping from a cis user. Antisemitism from local user followed by ableism from admin. Admin defends antisemitism. Queerphobic user."
skippers-bin.com for "[FediNuke] Admin profile page has an “n-word pass”. Runs a host of bots posting lewd artwork, some of which venture into lolicon and Black-fetishism territory (e.g. “NessaBot”). Runs “glow_in_the_dark_cia_agent”, one of the biggest followbots on Fedi. Instance rejects deletes. Another admin has a Confederate battle-flag and unreclaimed transphobic slurs in their display name. skippers-bin.com is run by the same pers[…]"
bae.st for "[FediNuke] see skippers-bin.com"
banepo.st for "[FediNuke] Runs a blockbot. Admin posts antisemitism, homophobia, and transphobia in one post, another with more of the same, all of that with a side of ableism."
bassam.social for "[FediNuke] The admin equates people being against anti-queer discrimination with “oppression”. After a user made a FediBlock post against bassam.social, its instance admin doubled down on permitting bigotry."
beefyboys.win for "[FediNuke] Runs a blockbot. Staff member “Prude” has a profile with a racist rant pinned. Staff member “Tyler” posts “racism is cool and natural” followed immediately by racial slurs, and other slurs in a non-reclaimed context."
boymoder.biz for "[FediNuke] Admin accounts post anti-Indian racism, racist copypasta. Staff includes “meso” from the.asbestos.cafe. Incompatible moderation standards."
brainsoap.net for "[FediNuke] dismissive over white supremacy, Nazi humor"
breastmilk.club for "[FediNuke] Admin “leyonhjelm” posts transphobic sui-bait, spamming the “mutualaid” guppe group with blatant queerphobia."
(the list has been truncated to the first 20 entries)