Nobody that wants him confirmed is going to want to go down that road, even if a photo turns up of him looking totally wasted.
I don’t drink, never have been a drinker, but some of my friends and classmates did incredibly dumb things where alcohol was involved back in college. My best friend had a house party, and got into one of those stupid drinking games with a couple girls he liked, and passed out. That ended the party pretty quick. You never saw a house party clear out that fast.
Nothing else happened beyond that, but it’s a miracle he didn’t die that night. He had no memory of that night afterwards. Sadly, I was the only person who was willing to tell him what happened.
I can think of instances where I or others were wrongly accused of serious, if not criminal, acts where there were no witnesses but the aggrieved parties told other people (“corroboration!”). “I didn’t do it,” will play no better in 30 years than it did then. Maybe nobody else here has ever had that happen to them or someone they know, but I’d find that remarkable. Granted most of us don’t need to worry about a nomination that spurs aggrieved people to make national news about it.
Then there are the things that did happen. Trying to defend yourself 30+ years from now based on foggy recollections of one person (perhaps accurate, perhaps exaggerated) would be extraordinarily difficult. I wasn’t a drinker in college either but I witnessed friends do things that could be construed in terrible ways if one were motivated.