I don’t know if you need this info, but I was pretty disturbed to see unexpected child pornography on a casual community. Thankfully it didn’t take place on SLRPNK.net directly, but if anyone has any advice besides leaving the community in question, let me know. And I wanted to sound an alarm to make sure we have measures in place to guard against this.
The best suggestion I have seen is to have a specific report category for CSAM. If a post is reported for CSAM x number of times, the post is hidden for moderator review. If it is a false report, the mod bans the reporting accounts.
Another issue is that post links can be edited. Trolls will definitely use this feature for abuse.
Ranking algorithms need to be adjusted so that if a post is removed like this, and then restored, it gets the same number of views it otherwise would have. Without that, a user-interaction driven automatic removal will get abused at scale.