More than once, I have hit the FWD/REV button on my impact wrench! Usually happens when I am in an odd position and shifting from one hand to another.
But for caliper and hub bolts, I tend not to use impact wrench. Manual breaker bar only. I have used heat from a propane torch on a couple of different vehicles.
This may not be by-the-book, but...
I put anti-seize on caliper bracket and hub bolts, then get them "good'n tight" with a couple of light taps on the wrench with a hammer when attaching is usually tight enough for me.
Never had calipers or hubs fall off or come loose. Having to recently take calipers and rotors off and put them back on about 5 times in the last 3 days... It is nice to not have to heat them with a torch to get the bolts out each time to loosen up Loc-Tite.