2. Child porn, (CP) which can be defined as images, videos, or links to such of anyone nude and under the age of 18, no matter what the context and sexually suggestive images, videos or links to such of anyone under the age of 18 with partial clothing. (Bikinis, etc.)
As mentioned above, that excludes the Nevermind album cover, but what jumped to my mind was the famous photograph from the My Lai Massacre. No shortage of classical art either. Perhaps a caveat is in order stating that if something could be considered CP according to the above rules, but clearly isn't treated that way culturally, get mod approval first.
5. Advertising your own site, service, or thing unless publicly cleared to do so by an admin or global mod. This also includes people affiliated with the creation, maintenance, or advertisement of a site, service, or thing.
Isn't there a marketplace subforum? How does that relate?
6. Breaking into or attempting to deface or damage the site or its host in any way. This also includes links to programs that could damage or deface the site or its host, instructions on how to do so, or where to obtain such information or make such programs.
No problem with the first sentence. But the rest of it... Where to obtain such information includes pretty much any website that teaches coding or networking. Links to software or instructions could possibly come up in context of discussions on security measures. As they say, the best way to see how security works, is to see how security fails.
I think that these rules are generally good, but need just a bit of polishing.