God forbid you haver to use a rubber mallet on a car - that's just unheard of!
Those panel-beaters/smash repairers are just barbaric! GIVE ME A BREAK!
Your opinion of what is an acceptable modification to a car is flawed due to the fact that you won't make necessary adjustments as required, then maybe you should leave the helpful suggestions to those who have done it.
If we all though like you we would all be driving stock vehicles - how exciting is that?!