Rant: A job in a converted Portland warehouse showed me why you can't trust old framing to be square.

We were hanging board on a wall that looked fine, but the top plate was almost an inch out over 12 feet. The foreman kept saying 'mud will fix it,' but I knew that was a bad call. Had to pull it all down and shim every single stud before we could even start taping. Now I bring my 4-foot level to every old building job, no exceptions. How do you guys handle major out-of-square walls without adding a ton of time?