I'm not familiar with atop but the website mentions netatop is optional and what I've found suggests you have to manually install it. Do you know if any distributions/packages install this by default alongside the atop install?
This is a good question - I'm not sure. The rpmspec doesn't seem to install it, so perhaps it's not quite that bad. The atop program _itself_ runs persistently, though, so, uh, still bad. :)