A mate is a Locksmith and he was at a nice restaurant in Sydney, in the
"Customer Only" car park and was clamped, he went back inside to the
restaurant and told them that they had clamped the wrong vehicle as he WAS a
paying customer, they rang the "Contractor" who did the clamping and he said
he would still charge them $50 to remove it, so he did what any locksmith in
his work vehicle would do, he pulled out his trusty petrol Stihl angle
grinder and cut the thing up into tiny pieces and took it back to the
restaurant and told them to give this back to the clamper when he returns,
hopped in his car and drove away :-)
to this day he has heard nothing else from this incident.

Thats because it was crown land being a uni , on private property they
have sfa authority

I remember that, not long before my father stopped working there, the
University of Newcastle signed some form of agreement with OSR such
that their parking officers did a training course and were then able
to issue official RTA type parking infringements for vehicles parked
within the university grounds.  I think that there was a side-effect
of making the roads within the grounds "public roads" for the purpose
of traffic law, allowing police to patrol and issue TINs within the
grounds.

And I'll add to that, if you go talk to the security office,
they will tell you to GAGF or at best to state recovery
folk. Same with council rangers.

but you don't work from home, so my point still stands. I would be willing
to bet that your building manager has no statutory power to issue a valid
parking infringement notice that involves the collection of a fine base
penalty, regardless of what your body corporate says. They prey on the fact
that most people will take the easy option of paying instead of taking the
matter further.