averow
--- it does beg the question that if such a discussion took place on a company frequency would it not be then easily overheard and then disseminated or leaked by other company personnel or amateur enthusiasts ?
Yes, such a discussion could be easily overheard and then, in theory, disseminated or leaked by other company personnel. However, we are not looking at a "western situation" here. In this part of the world, dissemination is easily and routinely curtailed and I'm not too sure that "air band" radio receivers are widely available to and used by, the general public, especially in the small hours of the night.
Are company frequencies somehow deliberately scrambled or kept anonymous for commercial or proprietary reasons ?
No, not as far as I am aware.