That said, being too loud is interfering with someone's life, so personally seems fair.
Being respectful of your neighbours is a little understood concept for some people and age and/or disability doesn't exclude your social responsibility to others.
That's not illegal, also this was in the U.K. Governments regulate the airwaves, that authority ends at the antenna. As the original poster already stated in a separate comment, he never transmitted anything that would have meaningfully broadcasted any interference on a licensed frequency band. This is no different than cable, especially considering back in the day cable networks were created to distribute broadcast channels from big antennas at their head end.
They didn’t even do anything to someone we located and identified and collected evidence for who was jamming amateur radio repeaters.