I was also wondering about the dream pod bed from ITF. With the right dreams you can change traits temporarily.
Also, there is a way to exploit the new loading screens to get more happiness points if you don't mind starting a game, quitting after 5 minutes or so, starting again, quitting again, etc. It would drive me crazy to do that, but I can see someone doing it. That said, I would suggest that it only be banned when the method of scoring involves happiness points.
Regarding the lottery -- you could ban looking up the winning numbers in Oasis Landing.