That's as good a way as any to strip the threads.

 

Not knowing what the hell you're doing forcing a bolt through an unclean hole and forcing a bolt into a hole at an angle strips threads, you should know what it feels like when a bolt is not driving into the hole properly and should promptly stop, inspect the bolt threads & then run a tap through the bolt hole to clean it. Not lubing bolt threads and not running a tap through a bolt hole (to remove possible debris) is the best way to screw things up, as well as re-using torque to yield bolts if threads are stripping on major assembly fasteners assuming you're using the correct bolt. Adding 5ft lbs is the general rule of thumb for torqueing things down that require you to use extensions. Using just the wrench itself is recommended but if you MUST use an extension 5ft lbs is the rule that most mechanics would agree with.


Plus, if its something critical like Differential U Bolts, or engine rotating assemblies, you usually use new bolts to combat potential problems. For something like intake manifold bolts, AC Pump, Water pump bolts & ect and things that don't require a ton of torque for clamping power you can reuse them as long as they visually look good and have no signs of stretching or fatigue and they drive into place nice.