Dear bottletop,
You are a tit.
A) You are parked in a HOSPITAL. Did it ever occur to you that, just maybe, they had more pressing matters to deal with? Such as a friend/relative could be hurt?
B) They scratched your car by ACCIDENT. You keyed their car on PURPOSE. You are a Vandal, and I hope you were caught on CCTV and will be prosecuted.
C) The car park probably had CCTV, but you were too moronic and/or lazy to consider this option of asking the Hospital security to identify the driver and ask them to contact you for repairs.
D) You're a tit.
Yours sincerely,
Dj_Jestar