That's dumb.
Why is it dumb? If people want a microwave to use an an actual microwave, its no use stealing a broken one, so breaking it stops theives. Why should other people get to benifit from something he spent money on, its his stuff, he can do what he likes with it.

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I sold a cast-iron bath to a guy who re-enamels them about 9 years ago for £200, would have got more but one of the fancy feet was chipped, they're probably worth a lot more now!

