Neural implants probably operate on microwaves given the small size. The same with RFID chips. Satellites and mind controlled people are useless if you can't communicate with them. This is the basic premise behind noise generators. If you wanted to help someone you would have to stop the implant or chip from communicating, get them to a facility that is fully protected from surveillance and they might have to stay there a while. EMI shielding could help cut off communication. A tin foil hat will not work because without a connection to earth ground there is no path for current to flow. No Faraday cage will work without a connection to earth ground. Only the reflectivity properties of whatever metal is used will apply. Reflectivity is only a fraction of what the hat encounters. They make EMI absorbent material. It can be bought from any electronic supply house. Mouser.com and Digikey.com for example. 3M makes a wide variety. A 12 inch by 12 inch piece can run about $50. A person could be covered from head to toe with this and brought to a facility that is a Faraday cage. If you don't cover the face, ground based microwave towers could still access the chip. A Faraday cage is an entire building, or enclosure, encased in copper or aluminum and grounded to earth.

I don't know how EMI absorbent material works. This is 3 ideas of my own. Since the material won't have a connection to ground for current my ideas try to generate current within the material itself. The first idea (top picture) would involve spinning microscopic wires into a material that has a small resistance to current flow. The wires would still have a small amount of insulation on them. They would be spun into small coils. The ends of the coils would be bare so as to make contact with the resistive material and make thousands of microscopic circuits as shown in the drawing. Each circuit would develop current and absorb the EMI.

A home brew version might be possible if you bend ordinary 1/4 or 1/8 watt resistors as shown in the next picture and then lay them out on some sort of substrate.

A more complicated version could be made by weaving wires together. It might require building some kind of manufacturing equipment or maybe an ordinary loom could be used. I think you could look up patents in the patent office online on how screen for windows and doors is made and copy that. The idea is to make screen that is half nylon and half aluminum. All the nylon would go one way, either horizontal or vertical, and the aluminum the other way. Every 6 inches or so connect a resistor across 2 of the aluminum strands. Keep each pair of aluminum strands separate from each other. The patent office could be used for all kinds of ways to fight back.

This is an addendum to the EMI absorbent material idea. Along with the mat of woven circuits put a layer of aluminum foil on each side. Aluminum has the best reflective properties of any metal. This will help trap EMI inside the mat. It will also reduce the power that needs to be consumed by reflecting a portion before it gets to the circuits. In addition to the coils and resistors in the circuits you could add an IC that helps to jam whatever is being absorbed. It works the same as an RFID. It's powered by the EMI.

The picture above is an ordinary rug loom. It could be used to assemble the 'mat' of circuits. The circuits could be housed individually in shrink wrap. You could embed the entire assembly in sheet rock and make it into a wall. This would be preferable in an apartment if you don't have the ability to secure the earth ground at the electric panel. Someone could remove the earth ground under those conditions and defeat a Faraday cage.