As far as I can tell, the only rule about the 
forum is what is written at the top of the page. 
As a long time reader, I know there are some 
things that are taboo, but what about the 
newbies? Yes, they _can_ read through every post 
in the archives (if they realize that there is an 
archive in the first place), but the threads 
about the things that cannot be discussed here 
have been deleted. Therefore, how can they know 
that they can't ask about it? But more likely 
than not, the new poster will skip the archives 
due to its length and ask away, possibly starting 
a flame war. If the forum rules are written down 
(and not necessarily about Taro due to the 
special cirucumstance), then it would be easier 
to say, "These are the rules that are followed 
here. This is why you were told by others to not 
post about [insert topic that we cannot discuss]."

---Trebuchet