I have rarely heard of it being enforced, though. I think Bp Bruskewitz and maybe Cordileone have told some people to stay away until they repent.
It really stinks to have good doctrine and zero discipline.
However, the disobedience of most, even at the top, would not justify our dereliction from the Church. I know I must live as a good Catholic for my soul's salvation. And I must pray for the healing of the Church.
The severed hand cannot heal the Body.
"The road to hell is paved with the skulls of bishops" - attributed to St. John Chrysostom
Saints have flourished in corrupt times all through the Church's history. The proper response is to pray for our earthly shepherds.