The question was how much damage to the grass not about the sensibility of the action:
I have a grass strip, the only damage is done IF
the strip is soggy wet and mini-furrows are ploughed
OR
the strip is dry and max braking can cause wheel lock up and ensuing scorching, tearing out of the grass.
If the grass is a couple of inches long it does retard the aircraft more than 1/4" (?) but this works in both arrival and departure!
Hope that helps.