It had occurred to me after we had not one but TWO cases of this exact scenario at our shop over the last coupla months. :)
One was a 4WD with all 5 tyres spiked (the spare was on the outside) and one just 4 days ago - a normal sedan.
A very sharp knitting needle applied (inserted) to the sidewalls of all four tyres is a good deterrent.
Let's see the RACV or NRMA or whatever you NSW's call it change thems flat tyres.
And, the tyres are not repairable. ;)
