This is great. I think the list should be vetted by forum administration and stickied.
I think that's intentional there is no comprehensive rulebook.
1. No zero or low value, pointless or uninteresting posts or threads. [1][e]
Except maybe in off-topic, with the count to 21 million with images, bn the person above you, ask the above question with a question threads.
14. All altcoin related discussion belong in the Alternate cryptocurrencies and it's child boards. [3][4][e]
From altcoin section description:
Note that discussion of how these currencies *relate to* Bitcoin may fit in other categories.
17. Trading of goods that are illegal in the seller's or buyer's country is forbidden. [2]
I think more like not recommended, since enforce it would be impossible. Or they would need to watch the nationality of people in the gambling section.
The image thread is interesting, in a way. I'll put the altcoin note in the guidelines. And regarding illegal goods, we do try to enforce it, at least the obvious cases.