I've often written here in defense of the right that I think Catholic school teachers have to form an (independent) union, but that doesn't necessarily mean that I'm an absolute fan of labor unions.
Case in point: This Article.
The article manages to point out a perfect storm of inept, bureaucratic government combined with a Draconian "the teachers job is more important than everything else" union mentality.
It doesn't have to happen this way. In other parts of the working world employers manage to create processes that efficiently deal with allegations of employee misconduct without paying the accused to sit around and do nothing (or even worse, sneak off to a bar and get snookered).