There is a CAO somewhere that prohibits running engines within x metres of a building (I forget and anyway, don't carry a tape measure with me when I fly), so you won't ever see drive through hangars on public airfields.
But on private property it happens more often than CASA know, or probably even care.
If it is pouring with rain or 50 degrees in the shade, given the facility, I know what I would do......
I recall a hilarious account of someone firing up a Robbo helicopter in a hangar and actually hover-taxying it out. All went well until he whacked a tree just outside the doors. The insurance claim must have been creative!