When I was in Singapore recently, I saw cell phones, PDAs, keys, CAMERAS (bag & everything ) etc left unattended on tables in food establishments. Well, you are right, need to be careful in this area..
Also, a big hurray to zoossh for his kind sharing in all the info.. zoossh bro, you have done your homework well. I would say you have been there and done it. I felt very happy that you are willing to share the information among us..