QUOTE
I think that there is actually a rather large amount of muggle inventions which have been altered for wizard needs, someone mentioned plumbing and cameras, and they also have radios.
And clocks.
I've always thought what a stupid thought from anti-Muggles wizards to think like that, and that Muggles just invent nonsense that no one needs, and that everything Muggles invents is to replace magic.
First, of course it is! Muggles don't have magic, but have the same brain that wizards, because magic doesn't need intelligence to be owned, only requires intelligence to be performed. So what are Muggles supposed to do, live in caves and look at their hands while wizards go on?
And second and most important... is it that Muggles invented everyday stuff, like chairs let's say, as 'Muggle chairs' and wizards invented 'wizard chairs'? I think there're certain stuff that you can't just say 'Ok, that is Muggle and we wizards don't need it'. It's really ilogical: wizards wouldn't levitate whenever they want to rest, they need furniture for instance; then, parchment, which might be invented by wizards or muggles but it's formerly a Muggle experiment... So, I find the whole thing really annoying. Besides, it's that of wizarding alterations on Muggle stuff: there wouldn't be any wizarding clock if Muggles hadn't invented first Muggle clocks. And then, would people survive without knowing the exact time nowadays?
I don't know, actually. If I ran into an anti-Muggle, I'd jinx him/her to have a pipe stuck in his/her ... pocket.