Any transmitting device can bleed over if working improperly, much like the CB did in days of old when they go into the neighbors TV.

Secondary harmonic-es can and do put out a signal, most of the time it is not harmful, but their has been time it has need heard on TVs.. Ham Raido Cop Cars etc.

We use to have crystal radios, no tubes just picking up the transmission of radio stations.

Circuits are much better shielded and designed today...

Not too hard to find a transmitter so turn them off...