Browser alerts...privacy issue

Hello:

I am receiving browser alerts from Cox about my bandwidth usage. They are correct and accurate, and I am well aware of how they work and why Cox does them. I have read the Cox notice about the alerts, here:

https://www.cox.com/residential/support/about-cox-browser-alerts.html

The problem is that the browser alerts appear on ALL machines that are on my network. I don't just get the alert, my children do, my guests do when they're on my wi-fi...it even pops up when I'm using Windows on my TV!

I REALLY REALLY REALLY need a way to disable these alerts, because they are a violation of my privacy in that they are notifying my friends and family of the activity on my account. I would feel the same way if it was a virus notification, but I haven't seen any of those yet.

Is there any way I can disable the alerts? If not, I will be leaving for AT&T, because the price is comparable, and they are less invasive.