What is offtopic and what should be avoided on this list?

What is offtopic and what should be avoided on this list? I would like to know what is offtopic and what should be avoided on this list. Looking for an answer from authoritative source, not a subscriber of doubtful quality. Appears to me wide variety of topics are discussed. Though the list is unmoderated, I suspect the dudes in charge of the list might take action against flooding with gross nonsense or commercial spam. Just trying to avoid being banned from unmoderated list ;), the way the heavily censored (in theory small moderated) Fyodor's full disclosure blocked me at SMTP level. Best of luck, -- georgi