One angry day I removed the screaming from my electric kettle, my coffee grinder, and my espresso machine; all of which beeped one to three times every time a button was pressed, power was turned on, or they finished a task. It was a hellish robot symphony every morning before that.

Anyone can do it. Once you've learned to spot a piezoelectric buzzer, ripping them out of everything you own is just a matter of how willing you are to take the case off of your electronic devices and find the circuit board. You just grip the buzzer with pliers and pull at it gently. Most of the time the top of the buzzer will have a plastic cap that detaches and there will be a thin metal film you can just remove. But some buzzer units are fully sealed - just rip the whole damned thing off the board, it won't hurt anything else.

edit: Here's a video of someone else doing it. Seriously, have a blast. https://www.dailymotion.com/video/x6fdbq3