One of the instance that is promoted on join-lemmy.org is burggit.moe that is defined as “NSFW & Loli/Shota/Cub friendly”. Loli is legally considered as paedophilia in europe and the US, so even if it’s legal in the country that host the instance, I would suggest to not promote it as an instance to join
I think morally and optically speaking, anything that endorses Loli or Shota is disgusting. On the basis of them saying they are “friendly” to that type of content, they should be delisted, regardless of if you see it as soon as you login or not.