I don't like age verification in general, for anything. The age gates in our society are very subjective.
Many times my Dad would buy alcohol at the grocery store w/ me (underage) in tow, but they never asked for my ID or refused to sell to him. Now, when I go buy alcohol as an adult with my wife (we are both in our mid-late 30s) they ask to see her ID as well as mine? If she leaves her ID at home then she has to wait in the car because they will refuse the sale if she comes into the store and cannot prove her age.
Buying a case of beer with a group of 8 year olds? No problem. Bottle of wine for you and your wife? Let me get both IDs.