"Neighbor's house alarm triggers when I put my car in reverse" | https://news.ycombinator.com/item?id=15947540
>mindcrime: This seems like a particularly evil variation of that idea:
http://www.goldmine-elec-products.com/prodinfo.asp?number=C6...
Electronic Cricket Kit $5.75; min $10 order + at least ~$7.20 shipping (U.S.)