I have been reading up about this too and am a bit concerned. I read somewhere that you can either lock the OBD port to stop physical access or disconnect it temporarily.
I tried removing the fuse for the OBD, but the car just went wonky after that - so it is not a solution.
Last: 330cd Sport - Silver Grey, 335d M Sport Coupe, F10 535d M Sport.
Current: AW F21 M135i, Coral Red, Pro Nav, Vis, HK, & Clunky Adaptive Suspension
Current: X5 XDrive 35d M Sport - Black Sapphire, lots of toys.
Last edited by 330cdsport; 08-06-2012 at 08:07 AM.