It happened to me this week. I lost my wallet, stuffed with cash on public transport. In it were my cards, memberships, drivers licence, in short, my whole life.
The next morning I had it returned intact. There was no fuss, no evidence of super-human religious intervention, just a decent person being responsible. This is by no means the first time, I am notoriously casual with my possessions.
The lesson? There are loads of decent people about, there also some scumbags but JWs are by no means unique.