There is more to this story, as a former bartender (from the Richmond area, where I bartended private parties and in the employment of restaurant/bars; and also Northern Va, where I lived for a short period of time); I have some insights into this story. Overall, I was in the food and beverage business that sold liquor for over 10 years - boy, do I have stories.
Most of my employers were very serious about the checking of ID's and hired serious minded door "bouncers" to check ID's at special events and busy nights. Whether I was working as a bartender, or as a waitress we knew the door bouncer didn't negate our responsibility to check ID's; for no one is perfect and if we got caught the fine was expensive. Plus there was the 3x you're out rule for the restaurants/bars.
There are books that can be ordered, that show the driver's license of all the states, including some foreign licenses. This helps tremendously, as I was able to catch a fake ID from a western state from a young man who told me "it is a new license, they just came out with that style" upon further questioning him about that state he didn't know much about it. When I refused to serve him and asked him to leave his friend said "I told you".
The local ABC personnel would do anything to try and trip us up - including trickery and lying. They watch and observe any weak moments, knowing when a bartender is likely to mess up. I am not saying this isn't good, because if an ABC agent can trip you up, then an underage person could. However one of my best stories about this is....
It was a Friday night, I had just gotten off my shift and was replaced by two bartenders. We were "swamped" with customers coming in the door. There was a man who asked one of the bartenders for two bottles of beer. The bartender asked him where the 2nd person was... we need to eyeball the person buying it, the man requesting it was, well not young - he had gray hair. He said my wife is in the bathroom, the bartender said giving him his beer - when she gets back.... A few moments had past, the bar was hopping.. the man knocked loudly on the bar and yelled to the bartender, "Hey, where is my wife's beer?". The bartender said "Where is she?" The man pointed down to the end of the bar where the jukebox was, there was 4, again obviously older ladies gathered around it. The bartender put the 2nd bottle of beer in front of the guy, and out from behind him steps out this YOUNG GIRL and the man shows his ABC badge and says... "no, this is "my wife" with quotation marks made by his hands. The bartender and the bar was cited; they had to go to court and he was fined, the bar received their first strike.
Now, this was trickery, but the ABC agent got "over" on the bartender. He showed a "weak moment", and how people can trick bartenders and servers and IT HAPPENS. The bar owners and the employees were warned that once you receive your first strike from ABC they would start riding you hard, trying to go for the 2nd and 3rd. ABC laws and regulations change frequently, and when you receive violations/citations other things happen; that is why it's important to stay abreast of the laws and regs.
When I moved to Northern Va, and worked in a bar 9/11 happened. The bar I was working at changed ownership, and I moved. At that time you couldn't get a job at any bar/restaurant, due to people not going out and eating much. I applied at a ABC package store, and was told by the manager there that ABC agents would send under age people in, with professionally made ID cards that are so good, many people can't tell the difference. The young people are dressed up, usually a girl - if they have nice clothing and makeup it's harder to tell the age of a girl. The manager advised the fake professional ID's have tripped up many employees, if I were to allow a purchase to one of these underage people with a fake ID, I would be fired and fined by the ABC board. I declined the job.
The underage crowd is another story, for they basically just want to have fun and enjoy the "rights of adults". However, in their quest for "fun", they too will do whatever they have to for access into the bars late evenings, or special events. I have seen underage girls offer door bouncers "favors" for entrance, and I have seen local "celebrities", such as news anchors and tv personalities bringing groupies telling the door bouncer or the waitress/bartender "Oh, they're with me"; as if that makes it ok. Bribes are also big on the list of ways to obtain liquor, whining and even fit throwing. I have seen it all. In Northern Va, a young woman gave me an ID that was not hers; she looked about 13 and was very immature acting. The ID she gave me was of a woman 32 years old; she told me when I gave her back and told her I wouldn't serve her liquor that I was being a racist, that she was that woman, that I didn't understand her ethnicity. The guys at the bar told her I wasn't a racist, and told her to go home and play with her dolls - even they knew she was too young.
Checking of ID's is a serious matter, but the server needs to show wisdom and exercise caution and sometimes just trust your gut instinct.