[TYPO3] Allow visitors to propose changes/new stuff

[Lukas Mattsson]

I have some sections on my website with content written by visitors, 
like job offers, events etc. Today, we have frontend forms for submit 
content, that we insert on proper sections manually.
Is it possible to allow the visitors to directly propose new records or 
modify existing ones? Of course we don't want to allow everyone to 
deface our site, so all proposed updates/changes has to be confirmed by 
a privileged backend user.