> The necessary equipment is usually installed on the upper floors of the embassy buildings or on rooftops where the technology is covered with screens or Potemkin-like structures that protect it from prying eyes.
Put a giant faraday cage around the US embassy. Won't stop everything, they're probably tunneled out into Berlin's telecom cables, but it would hinder cell and satellite.
Oh, you need access to American satellites from the US embassy? You'll have to earn your privileges back.