One thing at a time, Tanax. Think and make the basic stuff first, and think about the addons after that. Don't think in advance unless you're absolutely obliged to. Example: start with the user system, as sugested. The most basic authentication scenario is this: user enters his username and password and he is allowed to post a topic. Otherwise, only show that topic, without allowing posting. Then, when you have the most basic system set-up, you will have plenty of time to add more features and options, whilst have a working system.

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