In a similar vein, many years ago I helped someone with a similar problem with a neighbour who had the volume too loud. As the aerial cable was accessible, I suggested he stick a pin through the neighbour's cable whenever the volume got too loud, and pull it out when the volume went down.
Sure enough, after a while the neighbour learnt their TV only worked if they kept the volume down in the evening.
Sure enough, after a while the neighbour learnt their TV only worked if they kept the volume down in the evening.