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It's something to do with legal. The lawyers think that screaming gets the point across better. You'd have to ask the legal department which approved the document in question.
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#4: Attribution notice removed
Source: https://writers.stackexchange.com/a/5757 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#3: Attribution notice added
Source: https://writers.stackexchange.com/a/5757 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/