What are some of the more common scams and frauds in Japan towards pachinko and pachislo? From what I've been reading, it seems like it's an industry controlled by organized crime over there. I read something about a device called a taikanki which sends out a signal to increase the ball payout in pachinko machines. From what I've seen and read, it seems like there are too many ways for people to cheat the machines for the parlors to stay profitable. Is there something I'm missing?