Bet you got it via email. Its a chain letter.
Whilst technically possible on (much) older cars, anything from the 90s or later would have a rolling code, so it can't be scanned, stored and reused.
But on the BBC programme Watchdog they recently did a feature of new BMW's being entered and driven off by using a devise meant only for garages. The cars were being unlocked outside the owners homes during the night. The last we knew BMW were urgently updating their entry codes and dealing with the cars individually to change certain elements of their security systems. 
High value cars, such as £70k beemers, its worth someone reverse engineering the security. Just so happens that BMW used the same system on the MINI.
Most high value cars are 'easy' to steal, as replacement ECUs ignoring the immobiliser are freely available.