[LAD] May I asked something OT?

A lot of kids wish to have a kill switch for their guitars. A kill switch is a short circuit, to 'stop' the audio signal. I'm not fine with this solution, but the kids argue, that e.g. an interruption does cause unwanted noise, especially for over drive sounds. IMO even using opto-electronics won't solve the issue, because the noise of the transistor overdrive effect still would be hearable, while for a short circuit there is silence. Has anybody an idea to solve this without a short circuit? I'm really not a fan of short circuits. Note, it's not possible to do an interrupt all the times behind the latest noise generator and even an interrupt could cause noise itself, while a short circuit indeed is a good way to cancel sound.