Disagree. Arcing across a bad electrical connection can cause, and is called, Electro Magnetic Interference. Isn't that what Marconi used to send his first
radio signals?
A spark-gap transmitter is a device for generating radio frequency electromagnetic waves. These devices served as the transmitters for most wireless telegraphy systems for the first three decades of radio (1885-1916) and the first demonstrations of practical radio were carried out using them.
Agreed.
However here we are talking about grounding. There should be no arching on the ground connection.