I used to participate in a bunch of forums across an range of topics and in recent years considered starting one myself but with the OSA (Online Safety Act) in the UK, it’s not worth the personal risk.
https://www.theguardian.com/technology/2026/feb/27/suicide-f...
The act and guidance are very, very clear that your safeguards have to be proportionate to your scale and audience. If you're running a small forum, a quick "I sometimes check the posts and make sure nobody is using it to groom children or exchange child porn" is just fine.