Why?

I was cleaning up my sewing area and I came across a kleenex wrapped around a big ball of pins. I couldn't understand how the pins got like that, or who would do something like that. What fun are pins to play with? Then I discovered that there was an incredibly strong magnet at the heart of the pin ball. Who does that? It was really hard to get them apart. I asked everyone, and nobody who lives here did it. Apparently I have an enemy who came in one night when I was asleep, vandalized my pins, and then left.