Privacy of communications is a protected right in lots of jurisdictions, not by default overridden by employer interests. From a values pov it makes sense as we

Privacy of communications is a protected right in lots of jurisdictions, not by default overridden by employer interests. From a values pov it makes sense as well, privacy is a human right and the fact that you're at work doesn't invalidate that, social interactions at work can be of a personal nature that is good to keep confidential.