The probability is that most older divorced and remarried couples know that their union is adulterous and would not presume to come up for Holy Communion.
 Since Vatican II almost everyone goes to receive Communion regardless of whether they are in a state of grace or not. Such a situation prompted a bishop or cardinal to marvel (sarcastically, of course) that it was good to see so many members of the congregation in a 'state of grace'.
I imagine that it it could be quite galling to discover that one's EEM  who is distributing  communion or the deacon's wife is actually on the pill and yet you, as a divorced and remarried, cannot receive the Sacrament. This situation is by no means hypothetical, believe me. I did know an EEM who let it slip that she was on the pill.
One can tell from the comments here that younger Catholics, and, sadly some older ones too, have absolutely no understanding of the Catholic doctrine of Eucharist.