As long as you use a double-pole switch, rather than two single-pole, there's no problem with your plan.

Just curious, why can't you shield the RF?

Thanks for your input. We can't shield because the RF originates from an attic antenna whose existential purpose is to propagate RF. The branch circuit supplies lighting to the attic and is unavoidably near the antenna. I don't need the light when the antenna is radiating, so isolating the branch by this means causes no inconvenience. My principal concern is code compliance. I browsed my 1978 NEC yellow handbook from NFPA and did not find anything relevant. I don't have access to modern documents, which are more extensive.

As said above, if you use a double-pole switch, there wouldn't be an issue. You'll be spending more for one and they might be harder to find because there aren't as many needs for them as the single pole switches.

• Leviton double pole toggle switch
• Leviton double pole Decora switch