How can I set my guide to only show channels that are in my subscription?

I see that this question comes up about every two years, and there is no better solution than individually blocking channels.

I beseech Cox to contact their competitors and make this part of their programming options. Other cable media companies have figured out a user-friendly solution to filter out unsubscribed channels from the guide, or at least gray them out so you can skip past them easily. 

so far, this is our biggest complaint with this cable service - sorting through dozens of channels to view the ones available to us.