Im sure after a few solid months of this constant call outs the emrgency services may well get fed up with the drain on their resources and may start charging for call outs.
Its the same system the cars use so that has been around for years, so I don't suppose there will be any massive increase in calls they get already. So what makes you think there will be solid months of call outs. If its activated someone has dumped their bike so there will not be that many false alarms. Mr BMW will have already looked at the feasibility of the system and spoken to the providers.