Some don't even cut holes, they bust through the luann with a hammer!
Soren is right on the "inspected" part. We are the 2nd owners of our house, and nothing was changed since it was built in 1995. I went through the house ticking off NEC violations, sheathing cut short of the box, romex run through ductwork, romex entering conduit with no edge protection, romex run 1/2" from the face of the stud behind drywall, bathroom light fixture mounted to the wall with no box, etc. Yet it passed inspection! Nothing serious or that could be construed as dangerous, but nonetheless, not up to code.
The best is the fact that this is a 2 1/2 bath home...there was ONE GFCI outlet upstairs in the guest bath. Wire runs from the panel in that basement then upstairs to that GFCI, and the other two bathrooms on the main level as well as front/back outside outlets are all wired to the load side of that GFCI as one 15A circuit!! Technically correct since all those locations are protected by GFCIs, but two hairdryers and there goes the breaker. I rewired so that each outlet now has its own GFCI but they are still on one circuit. particularly annoying since the TT is plugged into one of the outside outlets.
So case in point, correct per code but pure idiotic!!!!