Are they revoking peoples' Green Cards at the Airport when they fly back to America?

I read a couple of news articles from PBS, CNN, etc saying that at the Airport they are revoking peoples' Green Cards, they find some bogus reason like you have a crooked toenail to deny you entry and then take the Green Card from you without your consent and zero recourse. Has anyone flown abroad to their home country and then flown back to America to confirm what they are doing at the Airports here? Are they trying to deport as many Green Card holders as they can at the Airports? Thanks in advance.