@lucasgonze @nf3xn report these posters to your admin/mod and check the mark that the report is forwarded to admin of the instance the poster is on.
the KimCrayton's instance also has their own admin and mod and should (and are) take care of this.
but above all, don't think you can 'save' someone, make their experience on fedi nice or give unsolicited advice if they don't ask for it. Kim Crayton has made it perfectly clear why she is on fediverse and it's clear they know what they are doing.
(sorry I deleted a post that was eroneously claming an instance as abusive)
when you see abusive posts, you can do a bit of research if they are coming from an instance that harbours abusers and trolls and such, you can report that instance to your moderator/admin (via a DM or report on single user) and explain your research. this way you remove a bit of labor from your admin and you help your community.