leaking AC current into household electronics
It sounds like either a bad design somewhere, or a ground that's poorly grounded.

Pretty much any appliance with a switched-mode power supply will leak a few milliamps to ground.  It's because of the capacitors placed at the front end of the power supply for EMC compatibility.  It's totally normal and meets product design specifications.

If your wiring is properly grounded, the voltage on the ground line should still be very low.  That can be checked by making a temporary known good ground and comparing with a volt meter.  A temporary ground can be created by pushing a suitable metal implement (big screwdriver, garden fork, etc) into a lawn or flower bed.  This should be well away from any existing earth rod.