There's a new way, affecting those who park their cars on common area with no private gate, like in apartments or flats.
The crooks collude with watchmen. They disturb your car, causing the alarm to go off. They know you'll come out and check. They'll hide and wait for you to examine your car, finding nothing wrong and seeing no one around, you'll go back in the house. They'll disturb the car again and again, and every time you'll come out to check, until you get annoyed and decide to disarm the alarm in order for you to retire to bed and sleep in peace.
That's what they'll be waiting for. Now your car is compromised. With no alarm activated on the car, they will break into the car steal it.
And you'll discover your car missing in the morning, after the good, quiet, undisturbed sleep!!