putting owner’s mobile number printed on the front window seems to be on its way to become a norm for car owners in korea. and often its not a scribbled note anymore. the parking convention in korean cities does require leaving the contact information on the car, as people may have no alternative in resting your car without blocking other cars’ exit route, for instance.
how private is your mobile phone number? what combination of contexts and other personal information makes it unacceptable to give the number out?