My flying school cross-hired a Cessna 150 at Essendon. The nosewheel tyre pressure was very low and we had to pump it up to correct pressure before we flew it. On take off and landing there was severe nosewheel shimmy and we wrote up the defect in the maintenance release and returned the aircraft to the owner (he owned his own flying school).
The owner went absolutely ape when he discovered the defect was written up and demanded to know why we had pumped up the nose wheel tyre to the correct pressure.
Turned out he knew about the nosewheel shimmy but decided he didn't want to incur maintenance costs to get it fixed so he simply dropped the tyre pressure to less than half of the correct pressure and that minimised the nose wheel shimmy. The other reason why he spat the dummy was because his maintenance release sheet had been squeaky clean and our defect entry spoiled the look of it..