'Alright so I was looking at the Basic Static, trying to take into account low-rez scaling. So instead of applying noise to every single pixel, apply noise in such a a way as to take into account each scaled pixel in a pixel-art game.'
Iv'e not had much(any) look in coming up with a solution to your question.
I think the calculations for the noise are done before the main part in the shader.
Have you tried using the 'step noise' part instead of the 'basic 'noise, it might resize better.
The only other thing I can think of is using a pixellated effect with a animated parameter.