Yes we have!
We didn't stopped sinning, though. We simply reclassified "sin". It is no longer a personal choice which involves turning one's back on God. It is now an exclusive attribute of unjust societal structures which oppress and marginalize the poor. We're also working on eliminating the sense of sin by attempting to eradicate nasty "guilt feelings".
I frequently sit out Communion when I haven't been able to get to Confession and I often get these "dude.....what is your problem", looks. It used to make me uncomfortable, once upon a time. Now I wear my forlorn and solitary presence in the pews as a badge of honor. I feel like I'm making a statement.
Yeah, I know what you mean. I went to Mass with a friend of mine from college in January, and he and another of his friends went up to Communion, and I sat it out. He asked me after Mass why I didn’t go up. I explained to him that I take a “better safe than sorry” approach to the Sacrament, and that I like to make sure I go to Confession beforehand. It might be a little scrupulous on my part, but again, why take the chance that you’re committing a sacrilege?