That's funny about the worrying the washer might put them out of business - and about being embarrassed to look like they're washing clothes with a toilet plunger. I have to say that I haven't yet bought a real one and have actually been using a real toilet plunger (brand new and clean of course) for hand washing...but I have written in large bold letters on the handle "This is for washing clothes ONLY!!!! Do not use on any toilet!!!"

Which of course will mean nothing if one of my kids tries using it since none of them are old enough to read yet. Hopefully it will just never happen.