I must be missing something here. Berating employees in a way that will become public news, surely isn't the best way to go about correcting their malperformance. If they won't correct their ways via direct face-to-face communication, then either fire one, reduce their salary, and/or transfer them to the nether parts of the globe. Taking one of these corrective actions would surely cause any other offenders to change their ways, would it not?