This way even unregistered users to your forum would be able to contribute in real-time.
Asking for movies to be added to the database isn't contributing. On the contrary, when users ask me to add an obscure movie, I do it as a service so they can manage all their movies. It's very time consuming to add movies to the database (find a poster, a plot, etc...), and I can easily get overwhelmed if there are too many requests. I certainly don't want unregistered users or bots to be able to make movie requests. I do my best to keep the database up to date by adding the significant movies as they're released, but the requests are generally movies that only the requester is interested in.