It can seem like you're living in a vacuum, unable to get assistance with issues like security, and without enough information to further your understanding of the topics. Luckily, this is not the case, and there are many resources online with large amounts of information on topics pertaining to security. Some of the good examples have been mentioned here.
If there were ever a center for the online security community, you could make a very compelling case that it was Full-Disclosure.
Started in response to other, moderated, mailing lists in which information was not freely available and censorship was a routine part of online discussions about security, the concept of Full-Disclosure promotes the complete availability of information, and as the name of the list implies, the mailing list promotes these ideals.
In accordance with these principles, then, the list is completely unmoderated (apart from rare instances of highly antisocial behavior such as spamming...