However, that still isn't illegal. That would be a civil dispute. "Illegal" is implying that he could go to jail and that he is breaking a law. Just nitpicking,

However, that still isn't illegal. That would be a civil dispute. "Illegal" is implying that he could go to jail and that he is breaking a law. Just nitpicking, but I think that "illegal" is a much stronger idea than simply "could get you fired or could get you sued."