Zed, you forgot kidney stones. One of the consequences of too much caffeine is it's easy to be dehydrated, which puts you at risk of kidney stones. Which essentially means you get the dubious pleasure of pissing razor sharp calcium rocks out your urethra. It hasn't happened to me, but it has happened to friends; based on their experiences, I wouldn't recommend it.
Happened to my father & it was the most agonizing experience I have seen him go through. Kidney stones cripple you with pain, you can't sit, you can't lie down. It rips basic comfort out of your life for weeks on end.
