If you don't think some of the coaches read this site, you are in fantasy land. Maybe not the head coach, but coaches always want to know the fans sentiment. ...
Perhaps there are some that check in here, but they have far better things to do with their time, so I would hope not. I do think that the AD probably checks in here, and I know that others from the athletic department do. They are the ones that need to know what fan attitudes are, and here is where they would expect to find the most extreme perspectivs.
In a way it's a good thing that BA has become what it has become. In the 2005-2011 years there was a too-cozy relationship, where BA was always supportive of the players and the team, and it came to be viewed as a "safe" place. Parents posted here regularly, and players did occasionally, and BA built a closer relationship between the players and fans, boosting the morale of all. That model was doomed to implode at some point, and it abruptly ended in 2012 when the fans turned on the players after the Miami loss, sucking a lot of morale out, and exposing the risk. A too-cozy relationship with fans is dangerous because fans are fickle, and I'm not just talking Ohio, I'm talking everywhere.
It took a couple years, but BA has evolved since then. The parents and players no longer post, nor do members of the Athletic Department. It's not the same safe, cozy place anymore. Instead it's just like the fan board for any major school, where you find a mix of opinions, some supportive, some critical, some happy, and some unhappy. The players, if they do check in, read it differently than they would have in the past, and come here knowing what to expect.
I'm a big believer in free speech, and I would never tell someone they aren't entitled to their own opinions, not entitled to express them. I also think that now that BA has evolved, it does no real harm, so go for it.