Fair enough matey... yeah, well Skylines, WRXs and VW GTI's are all amongst the most vandlised cars... well, on that list anyways... so yeah.... just take good care of it... always park it somewhere that has good lighting... can be visible or is relevant close to where you work etc.... and don't be cheap on alarms, get a good one...
thats all you can do.. if they want to steal it... they will buddy... prevention is better than cure so they say.