There are a lot of people out there that read the 
forum, and are very well educated in cels, and 
the animation industry/practices that for various 
reasons choose not to voice their opinions, or 
only speak up at certain times.  It sad to see 
some of these people get flammed just because 
they don't post 5 times a day, when in fact this 
person may work inside an animation studio and 
really knows what they are talking about. Or is 
someone that has been collecting for 10+ years 
and over time has amassed a wealth of knowledge 
that from time to time they like to share, you 
get the picture.

The most successfull boards I've seen deal with 
stuff like this in one of two ways (both of which 
require users to register):  One is that a 
certain title is given per the number of posts 
from the user.  So for every 50 posts (or some 
arbitrary number) you get a different title, and 
this denotes activity and typically more 
knowledge on the subject.  Major problem with 
this method is that you get people that post 
menial posts 5 times a day and can appear to have 
some god-like avatar; when in fact they don't 
know all that much about the topic of the board.

The other functions much along the same lines, 
except the moderator(s) assign the titles to the 
users, and some kind of system is created to move 
upwards (usually in numbers of posts, or threads 
created with responses, etc).  The few boards 
that I've seen like this have been very 
successfull.  When you see the "high ranking" 
people posting they are almost without fail 
totally accurate and also people will really 
listen to what they have to say, even if they 
only post maybe once a week or so.  While these 
boards are great to go to for information, there 
is a lot of administrative overhead.  Typically 
there will be 6-12 moderators for the forum to 
handle all the adminstrative work behind it and 
maintain the level of quality.