They shouldn't.
They won't trust each other, and they won't trust you.
If you allow this sort of thing in your department, you're basically saying it's OK. No, I'm saying that I don't care what they do as long as my life isn't interrupted by pointless conversations like this one.
If you allow this sort of thing in your department, you're basically saying it's OK. No, I'm saying that I don't care what they do as long as my life isn't interrupted by pointless conversations like this one. [SEP] They won't trust each other, and they won't trust you. [SEP] They shouldn't.