bluetooth an integral part of mobile phones can create problems , has any body thought bout it....one such is bluejacking,The act, practice, or activity of sending anonymous text messages to a mobile phone using Bluetooth.. People using Bluetooth-enabled mobile phones and PDAs can send messages, including pictures, to any other user within a 10-meter or so range. Because such communications don't involve the carrier, they are free of charge, which may contribute to their appeal. To send information to another party, the user creates a personal contact name in his or her phone's address book -- the name can be anything from the sender's actual name to a clever nickname.Bluejackers have devised a simple technique to surprise their victims: Instead of creating a legitimate name in the address book, the bluejacker's message takes the place of the name. The prank essentially erases the "from" part of the equation, allowing a user to send any sort of comment he wishes without indentifying himself.

so next time whenever u are sitting in a restraunt beware that ur mobile can also be bluejacked with the unwanted messages

What do I do if I am BlueJacked?

Whilst you can choose to "Accept" the message it's best to avoid doing so. If Accepted then the message will be added into your own Contact Phone Book and that could fill up quite quickly. If the sender has added any additional information into the Contact that they sent you then you can only see this by Accepting it and then opening up the new Contact. However as the idea behind BlueJacking is sending simple messages there is nothing to be gained by storing it. Simply choose "Delete" or "Erase" and then get your own back on them.