I'd like to think that the near future will allow large space-based solutions in place of Earth-based and increasingly radiowave-polluted ones. A far-side moon

I'd like to think that the near future will allow large space-based solutions in place of Earth-based and increasingly radiowave-polluted ones. A far-side moon solution's probably still quite a way off, but I wonder if some sort of lagrangian or outward-facing satellites in geosynchronous orbit might work. I'm imagining satellites with large Earth-facing shields, sort of like a radiowave version of the sunshield on the James Webb Telescope. I'm probably missing some really obvious Physics 101-level reason that wouldn't work, but a girl can dream.