It’s hard to assume that people broke the fast as you’d have to almost be eating as you pull into the parking lot to do so (the fast is one hour before receiving, not one hour before Mass begins). I’d only like to see less receive b/c so many receive in a state of sin - remember we can eat unto condemnation as well as unto forgiveness depending on our disposition. People would more likely stay in the pew if more people did it on a weekly basis. Right now (as the OP attests) most people equate going to Mass with receiving. That really shouldn’t be.
At the point of the Eucharist, and at this point in my life, I am only concerned with my own state of grace, and not those around me. I don’t know anyone else’s state of grace or their interior life by how they look on the outside. I have been trying to pray, as I receive the Body and Blood of Christ, for all those in attendance at Mass, and also for specific people or groups not at Mass.
It can be taught from the priest, such as during the Homily, or even in the weekly bulletins, how to receive the Eucharist, and how to do so in a state of grace; when to receive or not to receive. I think it’s important though, not only to teach/inform of what to do, but
why to do it that way.
Yes, I do have a difficult time with well known public figures receiving Communion while professing their belief in abortion, same-sex marriage and other things against not just Church teaching, but the rule set forth by God. But until my neighbor publicly confesses a belief in abortion, or same sex marriage, to me, it’s not my place to comment on his reception of the Eucharist.
ETA: I believe I should have said fewer. If my son was here, he’d be appalled, clearly payback for trying to teach my mom how to say ‘washer’ correctly (no R!

).
