All of this is bringing to mind our recent experiences. In hind site, I remember now it was more the younger CMs (20-ish) just waving us through toll booths, or glancing at the AP card at restaurants but the older CM's asking for ID. That probably happened only about 3 times on our last trip. Interesting....
But all CM's, all ages, have carded my children (all adults) for alcohol at restaurants. So it hasn't applied to that type of carding, but for parking and AP discounts that I can remember. Although, all my children have their ID ready before they place their order if they order an adult beverage to make it easier on the servers. I've seen too many people wait to be asked for ID to order alcohol and then act like it's the biggest hassle in the world to show it. If a restaurant has to abide by laws, it shouldn't be an issue if a customer has to prove they are also compliant with the law.