Coca-Cola thought personalized bottles might bring some summer fun to its fans. Instead, it met the internet. The company's make-your-own label promotion lets customers write short messages on custom Coke bottles. Although Coca-Cola tried to block some slurs and trademarks, social media users were quick to discover that the company's restrictions were hardly comprehensive — and in some cases blocked inoffensive terms. For example, "Black Lives Matter," is blocked. But "White Lives Matter" isn't. Coke included a special rainbow label for pride month, but you can't write "Gay Pride" on the bottle. However, you can write "I hate gays." "Hitler"...