fact is any alarm can be messed with the best option is, use Any deterent including clublock, etc to deter any theft.
Dam i used to park my car in starcity carpark no worries but with the recent spate of thefts i dont risk it. Also i wouldnt leave my car in any multi story car park.
Like BB said, Harbourside dont care at all about anything bar the $22 fee people try to evade, that goes for most parking centres!