Buckie
We've studied this in the west of Scotland for decades. The Catholic abbey of Buckfast in Devon produces an alcohol/caffiene brew called Buckfast Tonic Wine which it uses to poison the Protestant working class in and around Glasgow. I have my tongue in my cheek but barely.
Buckfast: a drink with almost supernatural powers of destruction
https://www.theguardian.com/lifeandstyle/2015/feb/27/buckfast-drink-with-supernatural-powers-destruction
Alcohol makes many lustful and aggressive. Which is great because it also makes anyone fall unconscious. Caffeine keeps you awake, and the worst drunk is an insomniac, energetic drunk.
Anecdote.
I was tricked into handling a west coast councils BACS transfer of employee wages that coincided with an Orange walk. I'd been employed partly to repair old mainframe terminals, partly to introduce PCs - none of their computer department had ever used a PC! I had never used a mainframe, and I had never experienced an Orange walk. All the operators and managers had declined, so I was volunteered.
I had stupidly got drunk the night before so I was handling a hugely important operation hungover alone the next morning not at my best, but I was fairly confident because I'd been walked through the procedure and it was fairly simple, more tedious than challenging.
Then the Orange walk started. I never actually saw it because I was inside working all day but I can describe it. 16 unmusical bands marching around my building playing six tunes continuously for six hours, blasting sectarian songs that got progressively more drunken and out of tune while being cheered on by a huge crowd who descended the evolutionary ladder with each rotation.
There were idiots standing on the very high smoked window sills of our operations room, so high that wouldn't be safe if they were sober, and the awful music, the hateful shouting and my throbbing hangover were making changing the tape reels and typing in the arcane instructions increasingly difficult.
At one point I turned on the radio for some relief from the chaos outside, Radio 4, spoken word, very quiet. One of the nutters on the window sill took offence, banged on the window and told me, "Turn aff that fuckin music or ah'll pan in these windows and slash ye".
The idiot parade finished before I finished, but when I left and locked up I looked down this long, posh street and the entire road was covered with broken green glass from all the Buckie bottles.
Caffeine is an antidote to alcohol, not a supplement.