I have never been upset that some posts of mine have been deleted by the moderator, even though none of my posts have been personal attacks against players or coaches; rather they have been deleted because of a lack of appreciation of my sense of humor, at least that is my opinion, and I understand this because my sense of humor is a little quirky at times.
On another point about unpopular postings, I received a ton of flack when early last basketball season I posted a thread about our basketball program entitled MEDIOCRITY, suggesting that we, as fans, were willing to accept the mediocre level at which we were then performing. Neither the thread nor any of my posts were deleted, but based on almost all of the replies from a large respected cross section of valued posters, one would have thought I had suggested we drop down to the Patriot league...or lower.
The irony was that a few months later, many of those who had so replied were agreeing in other threads how mediocre our team was performing and how many were content with that level of play.
As far as fans who no longer post, for whatever reason, I suspect the attrition is typical of other message boards. It is not tragic, not even a matter of concern, but rather the inevitable consequence of hundreds of posters, although they all be united in supporting their university, having different opinions about how to achieve goals, and, on occasion, expressly posting their immediate feelings without allowing the feeling to subside or settle into a more rational reaction. Such is human nature. Such is the nature of a message board. As others have stated, deal with it or move on. The vitality of this board will not be at risk regardless.
BTW, I think the moderator deserves both a heck of a lot praise for the many hours he puts into moderating this board as well as for his understanding and tolerance of many of the apparent unpopular posts allowed to remain on this board.