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.
Me too. They have huge advantages but you need to spend what Ofcom calls a negligible amount (not more than a few thousand) to set up and ideally set up a company to limit liability.
Why? You are significantly more likely to be struck by lightning when out for a walk then prosecuted for running a forum under the online safety act.
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.
At some point surely we have to start openly defying the OSA and similar acts. What jury will convict someone for operating an online forum about sharks and not ensuring every user is older than 13?