There is a National Radio Quiet Zone (NRQZ).  Oh yeah, we are in it!  No public cell phone towers.  Only small, low power, local radio stations.  No local TV stations.  The observatory has a hot spot truck that they send out to snuff any tramp radio freq source within 10 miles.  They track the source of the signal.  Walk up to the door, ring the bell and fix it.  At the NRAO’s cost.  Mostly they fix shorted out electric fence…this is farm country after all.