At the outset, given the confused reading and interpretations of "The Joy of Love", our local bishops must give priests and laity sound teaching on the use of the Internal Forum.
But with that said, every priest and lay person knows that people who should not receive Holy Communion do receive and each Sunday. That's a fact. My attitude about this is that we make clear who is eligible, but if the ineligible receive, I simply place them into the hands of our merciful God and let Him worry about it.
Our Easter Mases are an example of this . All our Masses were packed and our 9:30 AM Mass people were standing outside! I did not know the majority who received, presuming they were visitors from out of town. But deep down I know they are nominal Catholics or are fringe Catholics.
My only consolation is that where ignorance and sin abound, God's grace is more abundant!