Addictive resources, such as alcohol, tobacco, opium, coffee, and tea.

Addictive resources, such as alcohol, tobacco, opium, coffee, and tea.
Tea also has caffeine in it, just like coffee.
I'd like to be able to use spies to frame other civilizations for misdeeds.
Spam. Tea also has caffeine in it, just like coffee.
-6 this war spoils our relationshipAnimosity between certain civs
What? Understanding how DNA works is not at all the same as practicing eugenics.genetics pretty well equates to eugenics in that context.
Animosity between certain civs - Some civs had wars and strife between them more often then with any other nation. French - Germans. Turks - Greeks. Etc.
Terrorism is named in a previous post. But I think poisoning water supplies of cities with your spy counts as a terrorist act!
That is more ridiculous then two civs having a grudge while being on the other side of the planet!
I just hope that there is an option in Civ5 to have Civs starting locations close to their real life neighbours.
I knew I'd find "ethnic cleansing" if I searched it.
They don't have to call it that. Call it mass deportation and building a "INS" unit like the inquisitor. I really think you should be able to deport foreigners whenever their numbers start building. Sovereign nations have to protect their borders.
Sieges
Don't know how controversial this is, but starving a city should make it more likely to give itself up. You should be able to besiege a city realistically. Sitting out on one of its many tiles bombarding it once a turn while it whips a new unit each turn and summons reinforcements from elsewhere should not be the way ...
Slavers: A hidden nationality unit that steals workers, either by reducing the population of cities or taking them from the land. Also, a slaver should be able to take from tribal camps and barbarian cities. You should also be able to enslave cities when you raise them. This will be funner if workers are made more important.
Capture When you defeat units you should be able to capture them in weakened form. You should be able to torture and/or execute them to decrease enemy morale, or hand them back to their civ, for diplo bonus. It should be difficult to use such units yourself.
The culture and the pop. from the city is gone, so most likely they are killed, yes. But even if they survive, many people are bound to die in the ensuing chaotic diaspora. Not to mention that millions lose their homes and their country ceases to exist... I've never understood moral arguments concerning video games. They are pixels on a screen, nothing more, nothing less. I'd be ok with Hitler using child-slaves to build brothels in concentration camps, if it brings me a hammer benefit (to use Civ 4 terms; I'm sure they'll change the production mechanic for Civ 5).
Why is it ridiculous, in an alternate-history-simulator?
@Tavenier: Also (though beside the point, as Ahriman's point is all you need), Germany had a huge population of Jews. Yiddish is a German language.
the Turks started their Civ in Central Asia and the Greeks in Europe....
Inca's founding Islam, but that isn't controversial. And I was merely commenting on the fact that some things mentioned here are considered ridiculous, while in Civ I have seen cities saved my merely arrows (longbowmen), Greece vassalising China, American axemen, landlocked Holland, groups of bears (I thought they were solitary) butchering thousands of people (settlers), Toledo founding Buddhism, etc, etc.