I think it counts as surveillance when it's published material, but surveillance of public material does not seem so troublesome to me.
For ex. if these teachers had instead published their complaints in old-fashioned letters-to-the-editor in print newspapers, I don't think anyone would be complaining that the government reads the newspapers. You could still complain about the chilling of dissent and the waste of resources.
For ex. if these teachers had instead published their complaints in old-fashioned letters-to-the-editor in print newspapers, I don't think anyone would be complaining that the government reads the newspapers. You could still complain about the chilling of dissent and the waste of resources.