I'm sorry. My soapbox has been activated.
And don't get me wrong, I love drugs. I think they're rad. I think there should be fewer barriers between most drugs and adults using them.
However, something that I think is fundamentally immoral is giving someone a drug without telling them:
What the full possible effects of the drug are including side effects
What the withdrawal effects are like
And society treats caffeine like it's not a drug. We act like it's not a stimulant. We sell it on street corners. We sell in schools, to children.
We don't tell you what the withdrawals are like. We don't even acknowledge that there will be any, even though they can be severe.
In addition to what OP listed, other possible withdrawal symptoms include:
Insomnia (yes, counterintuitive as it may seem this is common withdrawal symptom)
Caffeine is a stimulant drug that causes physical dependency quite rapidly. The withdrawal symptoms can persist for days to months.
I reiterate that I think drugs are cool. I'm drinking a caffeinated beverage as I type this. But I feel strongly that we should treat drugs like they're drugs. We should not pretend that the legality of a substance negates its status as A Drug™