Definitely agreed on the alcohol points. In the US at least, alcohol does not have to have any ingredients list on it. I contact manufacturers for EVERY type of alcohol that I drink. You may have a little bit more of leeway on this with a nut allergy, because I know that there are some definite avoids and typically safe things alcohol wise in that realm, but I have life-threatening fruit allergies, and alcoholic beverages are full of that kind of stuff.
As for keeping yourself safe and noticing a reaction, I very rarely drink enough that I would feel uncomfortable reading a label and assessing food safety. There are only a few occasions where I would be comfortable being that intoxicated. One: I am home, and staying there - all the foods here for me are safe, at least at a necessary level. We do have a few foods that I don't like with my minor allergens, but we don't have any of my life threatening allergens in the house. Other circumstance: I used to have a friend who would sometimes be our designated driver who I felt I could literally trust with my life. I would check all of the mixers and brands with the bartender before drinking, and he would check to make sure all my refills were the same. We'd often stop at a gas station or grocery to get munchies on the way back home, and he'd pull one of my allergen cards out of my purse and check the ingredients before he'd let me buy anything. (In fact, a couple of times he wouldn't let me buy safe things because he was worried about something or other in them - commonly soy oil - I only have problems with the protein, thankfully.)
Definitely something that I would talk to about with teens & college students. Not only will being intoxicated make it less likely you'll notice that a reaction is starting (and with some reactions, you really don't have that much time to act before things get really ugly), but there's also the peer pressure aspect of not wanting to say anything if you notice something, because you don't want to ruin the party. But not wanting to ruin the party is not worth dying. And yes, that seems dramatic, but it really is that serious.