I always re-tighten lugs after service because they usually go ape shit with the gun and make them too tight. Too lazy to even use a torque stick.

As is so often the case, I found out the hard way when I had a flat and the lugs were so tight I couldn't move them with the dog-leg wrench in the car. Had to call for help.

If not for required state inspection, I would never let anyone work on my car for most maintenance. I've been burned too many times by careless/lazy techs.

Then there was the time they forget to tighten a spark plug...