The evidence is clear - alcohol can be dangerous.
Alcohol is a poison that can be used to kill. Having a few drinks with your young adult before sending them off to college might not be legal drinking age wise but it might be wise to let the young adult know just how incapacitating a few alcoholic beverages can be. Elsewhere on this site I mention dedicating it to the goal of reducing the number of lives lost to overdosing on alcohol. You don't need to get behind the wheel of an automobile to be killed by alcohol.
Parents could also simply discuss the topic of moderation and eating some food and drinking some water when having an alcoholic beverage or a few. The most dangerous drinking is when alcohol is ingested rapidly with no additional water or food. The body needs water and nutrients to detoxify the alcohol. Bars used to provide free snacks such as popcorn or peanuts to bar patrons. The salt and other nutrients helps to replace the nutrients that are lost in excess urine or used up in the detoxification process.
I've probably spent more sober hours in a bar than many people so I've observed a lot of drunkenness. Even one drink could affect my balance and I prefer to dance than drink. Live music is fun and so is staying alive. The message not to drive drunk is important but another important message is to know your limits and to pace yourself with some water or juice chasers and some salty snacks.
Please warn your children that bullies with amazing liver capacity are not cool and can be lethal even though they might seem like the life of the party. Being a bully might be the in thing to do but it is not cool or romantic to be a killer or a bully.
Alcoholism can become a problem later in life even with an unusual liver capacity. A deficiency in the cannabinoid receptor system may be involved. There are foods that contain cannabinoids, or the phospho-nutrient building blocks we need in order to make cannabinoids that aren't controlled substances, so that is not a suggestion to seek out illegal or controlled sources of cannabinoids (medical marijuana). See the section Addiction or Starvation? for more information about the potential genetic issues that may underlay a tendency towards binge eating disorder, alcoholism or overuse of opiates. Nicotine and other addictive behaviors may involve differences in the cannabinoid system, except cocaine/crack cocaine addiction does not seem to involve the cannabinoid receptor system.