@jobblue:
I can’t speak for other parents, but I think there is a difference between allowing kids to occassionally have beer or wine with dinner and binge drinking.I have read studies like the link you gave, and there is no doubt that alcohol interferes with brain function, not surprising, given that it is a drug that operates on the brain. However, there is a big difference between binge drinking and a kid occassionally having wine or beer with dinner at home, the study doesn’t say anything about the effects of occassional alcohol consumption is. If a kid gets drunk in high school once, that isn’t going to scar them for life or make them disabled, but continual use of alcohol (or any drug) is likely to cause damage. This kind of reminds me of alcohol and pregnant women in some senses, for years there was this mania that any alcohol a pregnant woman ingests is going to hurt the baby, yet from what I can tell all the work on this deals with fetal alcohol syndrome, and with that the studies all focus on women who drink regularly and a lot during pregnancy, not on a woman who might have an occasional glass of something. Yes, erring on the side of caution is to say “a pregnant woman shouldn’t drink” or ‘an underage child should not drink’ (said child being as much 18,19,20 years old, I wonder how the gis during WWII didn’t come out brain damaged, given how much those soldiers often drank), but that kind of thing also can devolve into scare tacticts out of reefer madness, rather than being sensible about it.
My own take, which I put in a prior post, that it is up to the parent to decide, and that while I personally don’t have a problem with a kid under 21 having a glass of wine or beer with dinner occassionally, talking very moderate intake of alcohol, that is up to each parent to decide. If a parent lets a kid get drunk to see what it is like, while I wouldn’t do that with my own kid, I also don’t think that if they let them do it once to see what it is like that it will damage them irreperably, studies like the brain study cited above are talking about long term, relatively heavy exposure.
In terms of the 21 drinking age I am torn. I had exposure to the consequences of an 18 drinking age, I was on a rescue squad in late high school and saw more than my fair share of accidents involving 18,19,20 year olds, and each year it seemed kids were lost to drinking and driving. On the other hand, I don’t think there necessarily is any magic number where suddenly a kid gets wisdom and ‘can handle his/her booze’ so to speak, 21 is not a magic number where "you hit 21, you are safe to drink responsibly’, science actually works against that in that the brain doesn’t fully develop until 25 or so (and personal evidence is that some people’s brains never develop!).21 was chosen in part because that was the old ‘age of majority’ that set drinking ages after prohibition until the 1970’s, and partly because statistically that is the point at which drunk driving incidents/fatalities ‘broke’ compared to 18-20 year olds, where the slope of the decline became significant. In the end, I would keep the 21 drinking age in terms of buying booze, but legally I think laws that make it illegal for a kid under 21 to have alcohol under the supervision of a parent go too far IMO, that is intrusive and frankly serves no purpose other than to enforce a moral stance, given that unless a parent is a foul up they likely would make sure any drinking was done occassionally and in moderation.