No, that is not legal. However, that kind of statement will not promote good employee relations and will build up resentment where employees will look for a reason to retaliate. Such retaliation may take the form of poor work, work slow downs, baseless discrimination claims, stirring up employee strife, bringing in a union, or other methods. It is not very diplomatic.
Answered on May 16th, 2013 at 1:18 PM