It isn't small to me but i thought i'd post anyway
People using disabled carparks , and having the approved window tag .
But they get and only them get out of their car and walk a significant distance (i pushed myself in my wheelchair) to the public toilets .
Then skip into the New World store come out with their trolly of groceries and pick them up a few bags in each hand and walk on out the mall to their car like a able bodied person ( i know some people have hidden and unseen ailments but this female was taking the piss)
My 82yo mum couldn't find a disability park near where she was meeting friends so parked some distance away and had an uphill walk to get there. Result: could not get out of bed for the next three days. For people like that such things can end the independence of travel for the rest of a life.
As you said, it's no small thing when people misuse them.