Darkle Jonkanon Have you seen this extension? (https://discuss.flarum.org/d/29656-age-checker-age-verification-for-flarum-forum) I think it's not exactly for posts, but you might be interested in it.
Jonkanon Darkle Thanks for the reply! Yeah I checked that one, not quite what i was looking for. I would like to give access to underage users. But hide post's that arent suitable to them.
