The UK Online Safety Act needs to be considered. The Online Safety Act explainer.
This idea could allow any content to be posted un-moderated. The server side scripts need validation of who is posting. A separate script to unlock and lock the posts is used to restrict ad-hoc posts. Some validation of the form data is needed. Ad-hoc posts would need to be moderated before publication.
data | guest data | guest data
Copyright Douglas Rice, doug.h.rice@btinternet.com , 2003