You can also try to report the user.
I did this with a fake 'jack' account; just to see what happens...
Is there any way to block this account? It keeps posting adult content even though I don't follow it. I’ve also muted the account, but its adult content still appears.
https://primal.net/p/nprofile1qqsqg3fkc47de0shfn3r7q25j4kft4rpjvdp2xnkz9ttwdz7lryqu3sgvjgk9
You can also try to report the user.
I did this with a fake 'jack' account; just to see what happens...