"zero-value" "entertaining" "pointless" "uninteresting"  
All these words are opinion based. they do for the forum what the term "terrorist" did for america. I agree, honest is best, remove "free speech" from the list. maybe you would want to consider adding "no slandering of individuals reputation" considering posts like this one:

http://forum.bitcoin.org/index.php?topic=20340.20

It's just not right for people to talk about things like this is public.

EDIT:
looks like i really put my foot in my mouth this time, maybe we shouldn't lock threads based on peoples accusations of other people:

http://forum.bitcoin.org/index.php?topic=20440.0