The only rule I really don't agree with is
The English word nuance comes from a Middle French word meaning "shades of color."
AND
History is stained with blood spilled in the name of "civilization."
http://owl.english.purdue.edu/handouts/grammar/g_quote.html

The rest are a bit more logical. Sticking a period both inside the quotation and outside of the quotation looks silly.

Campaign? That's a great idea. Let's brainstorm for some campaign slogans.

Punks pushing punctually for practical punctuality
(or simply Punctual Punks for Punctuality)

Colin's colon coalition!

We won't stand for this period!
As in "we won't stand for this period" (before the end of the quotation) and also "we won't stand for this... no matter what!"


Man, I love being cheesy.