You just posted your PIN for the whole world to see including robots that will harvest it and spam you from time to time. It's not a good idea to expose this information so readily.
that's not true because I haven't received any spam what so ever and I've had my pin posted since day 1
It is true, search the forums. You'll see a lot of people that got spammed like crazy because they posted their PIN. And don't confuse this with BBM, it's PIN messages they use to send you the spam.