Teachers publicly attacking administrators

Recently, on two separate occasions, teachers have used a public forum to attack administrative staff from their own district.  The first incident occurred at the January 29th WCCUSD board meeting, in which a Kennedy High School PE teacher publicly accused a WCCUSD Area Director of "bullying tactics."  Recently, a Hercules teacher has used a blog forum to accuse a Hercules principal of "creating a hostile and toxic workplace."  

I am all for free speech, but this is about the workplace.  These are employees, not your average citizen.  Recently, as a public employee myself, I publicly (via a news reporter) criticized the actions of another public agency, actions involving the death of a family friend.  I was then, three times, called into my superiors' office and persuaded to keep quiet, that my public criticism of this other agency could have consequences.  I had not mentioned my employer to the reporter, but did mention my job title which is indirectly linked to the other agency I had publicly criticized.  Those with my job title are seen as being part of one larger family, irrespective of employer.  Ok, lesson learned.   

So imagine how it appears to me when I see rank & file teachers publicly attacking their own administrative staff, who when it comes down to it, are also their co-workers.  Isn't there supposed to be internal mechanisms for addressing such concerns and allegations?  Such mechanisms protect everyone involved, as those on the receiving end of these attacks, are innocent until proven guilty.  Let's not forget, even administrators make mistakes.  I'd sure hate to have my workplace mistakes publicly aired. Such internal mechanisms protect the employer from further harm.  Such mechanisms help ensure that my daughter will not be in the middle of a very toxic environment. 

Formal mechanisms that should be in place include whistle blower complaint procedures, union grievances, and other internal avenues for seeking resolution.  How can publicly attacking an administrator not be seen as an act of war?