MY USA TODAY COLUMN: When attention gets monetized, it’s up to consumers to make reasonable limits on the supply. “One needn’t look far to see that today’s social media seems to keep people angrier, more reactive and less thoughtful than we used to be. (And it’s not as if people were paragons of reflective virtue beforehand.)”

Plus: “Personally, I quit Twitter. For me at least, it was the most addictive yet also most unsatisfying social medium. If lushly illustrated sites like Instagram are the equivalent of a fancy Las Vegas casino with chandeliers, free champagne and elegant carpeting, Twitter is the social media equivalent of a row of gas station slot machines being repetitively worked by emaciated, chain-smoking senior citizens.”